ok, I understand. Tank you for yor reply.

The difference is the speed, DOS4GW is very slow. DOS32A is very fast.

Yes with DOS4GW there isn't any problem ,DOS4GW.EXE ver.2.01 with S2_3DFX.EXE runs good but it's very slow. My problem is why DOS32A crash if with de screamer 65000 colors and hig resolution it's OK, and very fast. The only problem is trying DOS32A.exe with s2_3dfx.exe.

I can play screamer 2 with DOS32A and it's more fast than with DOS4GW in normal mode, but when I run DOS32A with S2_3DFX the game crash. the text says: sorry for my english