here are all the remaining (I hope) cdchecks from:
Winpod: 004A216D
PODMMX: 004A10ED
Wpodd3d: 0049EA06 - 0049FC1C
Podd3dx: 0049E016 - 0049F22C
thank you sincerely for give some of your time for that, you are very kind

I'll check with olly the two remaining exes probably in the weekend (the 3dfx ones).
I don't and can't use ati, s3 and direct3d 5 versions so I will not touch them

The cracked exes so far work perfectly on a win98 machine, a windows xp one and on vista too.
Good job Cowsheep!
A weird and not important thing, I tried to debug the exes running them NOT in admin mode and I found some curious results, weird behaviors:
None of them went to main menu, they all asked for cdrom, obviously with modified exe: some executables gave old already NOP, some even gave
new addresses!
I use the vista pc for testing and debugging, I have the same phenomenon
in the Xp computer, starting the game using windows 95/98 compatibility mode or normal mode affects some previously found addresses (it asks for cdrom at that address even if that has been already edited).