hunvagy: Kinda necro, but a working solution ;) Bought the game with the Interplay sale, and ofc was not amused by the fullscreen only option, so gave it a try with dxwnd. This little app forces games into windowed mode. And have to say, it works flawlessly.
http://dl.dropbox.com/u/23615006/dxwnd.zip In the archive you will find all you need to use it with Lionheart, just delete the standard entry, and add the executable from where you installed it. You can even expand the window to fullscreen, though on 16:9 it'll be ugly. Enjoy :)
Perfect!
file:///C:/Users/tdrake/Downloads/v2_04_58h_build/help/DxWnd.html
Using DxWnd
Just double-click on DxWnd.exe to run the graphical interface (a tiny white empty window), then locate the executable for the program you'd like to hook and drag & drop this file into the DxWnd window. A complex dialog will appear, but in many cases the built-in defaults are sufficient.