(update for the gradius1 cheat)

! 6 = shield

!cheats for blueMSX :gradius2
!(c) 2005 Albert Beevendorp and (c) 2005 Patrick van Arkel
!Added stage (c) 2006 Benoît Delvaux
0,57856,153,0,lives
0,58438,1,0,fake metalion mode
0,58376,15,0,nice colors
0,57987,14,0,nice colors
0,58368,2,0,shield 2=on 0=off
0,58425,3,0,nemesis 3 style circling options
0,61685,255,0,all combi's with konami carts
0,58370,5,0,speed set to 5
0,58419,3,0,napalm missile
0,58416,0,0,deactivate normal shot
0,58418,3,0,get laser
0,58379,2,0,get options
0,58384,1,0,get options
0,58400,1,0,get options
0,58420,2,0,up laser
0,58421,2,0,down laser
0,57857,1,0,stage (1-11;0)
!1-7 = normal stage
!8 = core stage
!9-11 = bonus stage
!0 = final stage

(update for the gradius1 cheat - I've removed the useless power cheat)

!cheats for blueMSX :gradius1
!(c) 2005 Albert Beevendorp and (c) 2005 Patrick van Arkel
!Added lives - stage (c) 2006 Benoît Delvaux
0,57858,8,0,always hyper
0,57650,1,0,always hyper
0,57652,1,0,always hyper
0,57653,1,0,always hyper
0,57654,2,0,always hyper
0,57856,3,0,always hyper
0,57857,10,0,always hyper
0,57867,2,0,always hyper
0,57868,0,0,always hyper
0,57870,2,0,always hyper
0,57871,2,0,always hyper
0,57888,1,0,always hyper
0,57920,1,0,always hyper
0,57440,153,0,lives
0,57441,1,0,stage (1-8 normal; 9-12 bonus)

!cheats for blueMSX :salamander
!(c) 2005 Albert Beevendorp and (c) 2005 Patrick van Arkel
!Added lives player 2 - stage (c) 2006 Benoît Delvaux
0,58112,153,0,lives player 1
0,58240,153,0,lives player 2
0,58368,1,0,option 1 active player 1
0,58370,1,0,place in position 1
0,58384,1,0,option 2 active player 1
0,58386,2,0,place in position 2
0,58400,1,0,option 3 active player 1
0,58402,3,0,place in position 3
0,58416,1,0,option 4 active player 1
0,58418,4,0,place in position 4
0,58139,20,0,get extra level after only one energy pod
0,58167,5,0,set player 1 ship speed (1-7)
0,57858,0,0,who needs a shield anyway
0,58128,7,0,all special weapons player 1
0,58176,7,0,laser shot
! 0 = no laser shot
! 1 = normal shot
! 2 = ripple laster shot
! 3 = laster shot
! 4 = screw laser shot
! 5 = meteor laser shot
! 6 = double laser shot
! 7 = triple laser shot
0,58177,3,0,missiles 0=none 1=normal 2=hawkwind 3=homing
0,58113,1,0,stage (1-6)

I have rewritten the Gradius 1 cheat to make it more explicit :

!cheats for blueMSX :gradius1
!(c) 2005 Albert Beevendorp and (c) 2005 Patrick van Arkel
!Added lives - stage (c) 2006 Benoît Delvaux
0,57858,8,0,always hyper
0,57650,1,0,missile
0,57652,1,0,laser
0,57653,1,0,option
0,57654,2,0,shield
0,57856,3,0,shield (1=off 3=on)
0,57857,10,0,shield
0,57867,2,0,option
0,57868,0,0,disable normal shoot
0,57870,2,0,enable laser
0,57871,2,0,enable missile
0,57888,1,0,enable option 1
0,57920,1,0,enable option 2
0,57440,153,0,lives
0,57441,1,0,stage (1-8 normal; 9-12 bonus)

If you prefer the SCC version of Gradius/Nemesis, then you need to use the following cheat (only the addresses are different from the PSG version) :

!cheats for blueMSX :gradius1scc
!(c) 2005 Albert Beevendorp and (c) 2005 Patrick van Arkel
!Added lives - stage (c) 2006 Benoît Delvaux
0,49666,8,0,always hyper
0,49548,1,0,missile
0,49550,1,0,laser
0,49551,1,0,option
0,49552,2,0,shield
0,49664,3,0,shield (1=off 3=on)
0,49665,10,0,shield
0,49675,2,0,option
0,49676,0,0,disable normal shoot
0,49678,2,0,enable laser
0,49679,2,0,enable missile
0,49696,1,0,enable option 1
0,49728,1,0,enable option 2
0,49248,153,0,lives
0,49249,1,0,stage (1-8 normal; 9-12 bonus)

Update of the Salamander cheat : I've found the way to play directly the special stage against Venom !
Note that it requires Gradius2/Nemesis 2 in slot 2 and to avoid graphic problems, it's better to use a MSX1 machine (I've seen the same problem in openMSX and blueMSX when using a MSX2 machine)

!cheats for blueMSX :salamander
!(c) 2005 Albert Beevendorp and (c) 2005 Patrick van Arkel
!Added lives player 2 - stage (c) Benoît Delvaux
0,58112,153,0,lives player 1
0,58240,153,0,lives player 2
0,58368,1,0,option 1 active player 1
0,58370,1,0,place in position 1
0,58384,1,0,option 2 active player 1
0,58386,2,0,place in position 2
0,58400,1,0,option 3 active player 1
0,58402,3,0,place in position 3
0,58416,1,0,option 4 active player 1
0,58418,4,0,place in position 4
0,58139,20,0,get extra level after only one energy pod
0,58167,5,0,set player 1 ship speed (1-7)
0,57858,0,0,who needs a shield anyway
0,58128,7,0,all special weapons player 1
0,58176,7,0,laser shot
! 0 = no laser shot
! 1 = normal shot
! 2 = ripple laster shot
! 3 = laster shot
! 4 = screw laser shot
! 5 = meteor laser shot
! 6 = double laser shot
! 7 = triple laser shot
0,58177,3,0,missiles 0=none 1=normal 2=hawkwind 3=homing
0,58113,1,0,stage (1-7)
! 1-6 = normal stage
! 7 = special stage (requires Gradius 2 in slot 2)

!cheats for blueMSX :arkanoid1
!(c) 2005 Albert Beevendorp and (c) 2005 Patrick van Arkel
!Added round - bat - speed - open door (c) 2006 Benoît Delvaux
!Changed also fire
0,57371,0,0,round (0-32)
0,57373,99,0,99 lives
0,57559,4,0,long bat
0,57560,14,0,long bat
0,57563,12,0,long bat
0,57564,8,0,long bat
0,57941,12,0,normal ball speed
0,58150,1,0,open door to next round
0,58705,2,0,always fire

Little update for the Arkanoid 1 cheat : your ball can now be always a glueball !

!cheats for blueMSX :arkanoid1
!(c) 2005 Albert Beevendorp and (c) 2005 Patrick van Arkel
!Added round - bat - speed - glueball - open door (c) 2006 Benoît Delvaux
!Changed also fire
0,57371,0,0,round (0-32)
0,57373,99,0,99 lives
0,57559,4,0,long bat
0,57560,14,0,long bat
0,57563,12,0,long bat
0,57564,8,0,long bat
0,57941,12,0,normal ball speed
0,58148,1,0,glueball
0,58150,1,0,open door to next round
0,58705,2,0,always fire

New update for the Arkanoid 1 cheat : the long bat cheat is now fully working !

!cheats for blueMSX :arkanoid1
!(c) 2005 Albert Beevendorp and (c) 2005 Patrick van Arkel
!Added round - bat - speed - glueball - open door (c) 2006 Benoît Delvaux
!Changed also fire
0,57371,0,0,round (0-32)
0,57373,99,0,99 lives
0,57559,4,0,long bat
0,57560,14,0,long bat
0,57563,12,0,long bat
0,57564,8,0,long bat
0,58145,2,0,long bat
0,58704,2,0,long bat
0,57941,12,0,normal ball speed
0,58148,1,0,glueball
0,58150,1,0,open door to next round
0,58705,2,0,always fire

!cheats for blueMSX :arkanoid2
!(c) 2005 Albert Beevendorp and (c) 2005 Patrick van Arkel
!Added round - player 2 - doors - frozen bonus - list of options (c) 2006 Benoît Delvaux
0,51072,0,0,round (right:0-34; left:128-162)
0,51082,6,0,infinite lives player 1
0,57226,6,0,infinite lives player 2
0,51086,0,0,open doors to next round
0,58065,0,0,all bonus are frozen
0,58086,1,0,all destroying ball
0,51081,3,0,option
! does not work on special rounds
! 3 = always fire
! 4 = glueball
! 5 = long bat
! 6 = 6 balls
! 7 = 3 balls
! 8 = bat with extension
! 9 = all destroying ball
! 10 = open doors to next round
! 11 = 2 bats
! 12 = mini-bat (hard game !)

!cheats for blueMSX :breakin
!(c) 2006 Benoît Delvaux
0,32158,5,0,infinite lives
0,34261,90,0,always fire
0,34262,16,0,long bat
0,34303,28,0,open room 2
0,34304,28,0,open room 2
0,34305,28,0,open room 2
0,34306,28,0,open room 2
0,34591,28,0,open room 3
0,34592,28,0,open room 3
0,34593,28,0,open room 3
0,34594,28,0,open room 3
0,34879,28,0,open room 4
0,34880,28,0,open room 4
0,34881,28,0,open room 4
0,34882,28,0,open room 4
0,35451,0,0,frozen guardian
0,35459,0,0,invisible guardian (hard game !)

!cheats for blueMSX :gradius3
!(c) 2005 Albert Beevendorp and (c) 2005 Patrick van Arkel
!Added lives - stage (c) 2006 Benoît Delvaux
0,58208,153,0,lives
0,58209,1,0,stage (1-11)
0,58211,0,0,only for stage 4 (one time)
0,58223,7,0,set all weapons and upgrades (find)
0,58238,3,0,choose option (1-3)
0,58239,2,0,choose shield (1-2)
0,58240,2,0,choose vixen (0-3)
0,58259,1,0,set 3 maps found
0,58260,1,0,set 3 maps found
0,58261,1,0,set 3 maps found
0,58262,1,0,spacefighter shield
0,58263,1,0,sensor
0,58267,0,0,activate hard
0,58268,1,0,activate find
0,58269,2,0,activate good (1=hard)
0,58270,1,0,activate expand
0,58880,3,0,set forcefield
0,58888,2,0,get all options
0,58896,1,0,get all options
0,58912,2,0,get all options
0,58928,7,0,set laser (to screw)
!5 = normal laser
!6 = meteor laser
!7 = screw laser
!8 = extended blaster
!9 = vector laser
!10 = ripple laser
!11 = fire blaster
!12 = big fire blaster
0,58929,13,0,set uplaser (14=downlaser)
0,58930,19,0,set guided missile

!cheats for blueMSX : parodius
!(c) 2005 Albert Beevendorp and (c) 2005 Patrick van Arkel
!Added lives - stage (c) 2006 Benoît Delvaux
0,57920,153,0,lives
0,57921,1,0,stage (1-6 normal - 7-9 bonus)
0,57937,255,0,more bells
0,57939,255,0,more bells
0,57940,255,0,more bells
0,57942,255,0,more bells
0,57960,4,0,full power
0,58368,2,0,shield 0=off 2=on
0,58370,2,0,shield
0,58378,15,0,shield
0,58379,2,0,option
0,58384,1,0,enable option 1
0,58400,1,0,enable option 2
0,58416,0,0,disable normal shoot
0,58418,2,0,enable laser
0,58419,2,0,enable missile
0,60167,15,0,shield

!cheats for blueMSX :superboy1
!(c) 2006 Benoît Delvaux
0,57411,5,0,lives
0,57412,0,0,world (0-3)
0,57413,0,0,stage (0-3)
0,57417,153,0,time
0,57418,153,0,time
0,57907,152,0,coins
0,58226,16,0,big mario
0,58227,16,0,fire (on GRAPH key)