Ok, here's a really simple way of doing splitscreen in TGF. It's laggy, and because I used the default platform movement you can only control one character at a time, but it does pretend to work. Run Split1.exe, not Split2.

ftp://ftp.tachyonlabs.com/pub/users/...plitscreen.zip

Hint: Use MMF instead. Or at least a custom platform movement. Both are waaay better for....
...well, anything.