How do i force windowed mode?

[Teegro]

im running the emu and it gets past the splash screens and into the first loading screen but then it all goes blank. something is screwing up the game displaying. I remember fiddling with the useropts.cfg file back in the day to do things like bypass the splash screens and im sure theres one for forcing the game to launch windowed but ill be buggered if i can find it.

any help?