@ sosimple
are you able to start a game correct from commandline with cart1 and cart2 as parameter?
(mame documentation)
something like this:
mame64.exe cpc6128 -flop1 "C:\AMSTRAD\yourgamedisk1.dsk" -flop2 "C:\AMSTRAD\yourgamedisk2.dsk" and so on...
if this works, we can find a way, to add to AM 
Thanks man.. I tried many things didn't succed yet. I am sure it can't be done, i just don't have enough Knowledge..
If i made it I'll post here. Thanks again.