I'm trying to figure out how to get Undying to run in a window properly. I know Glide doesn't support windowed mode, so I went into the game's folder then the System.ini file and changed from:

[Engine.Engine]
GameRenderDevice=GlideDrv.GlideRenderDevice

[WinDrv.WindowsClient]
StartFullscreen=True


To:
[Engine.Engine]
GameRenderDevice=D3DDrv.D3DRenderDevice

[WinDrv.WindowsClient]
StartFullscreen=False


But I have found that when the game loads, the first screens are always full screen and it stops Aero in Windows 7. Is there a way to fix this?

I would like to know this as well since the windowed mode solution in another thread doesn't seem to work for me (or I'm doing something wrong).

Did you know that you don't need to edit the System.ini manually via notepad or wordpad?. When in game, press tab and type in "preferences" then hit "enter" (without quotes). The game uses the Unreal Tournament engine, so if you need to know how to tweak the game, just look up "Tweaking Unreal Tournament". The 3D Spotlight website has a good tweak guide, if you didn't already know.

You can go into windowed mode by pressing alt+enter in-game.