I couldn't find any config file ... it might be there but there are lots of them ...
I did find that I could get the game to run in Widescreen or TripleHead by editing the registry like so ...
Back up your registry first ! ... and if your not comfortable with this don't try it !
1. Click on Start then go to Run.
2. Type in regedit and click OK.
3. Left-Click once on the plus sign next to HKEY_CURRENT_USER.
4. Left-Click once on the plus sign next to a folder labelled Software.
5. Left-Click once on the plus sign next to a folder labelled Activision.
6. Left-Click once on the plus sign next to a folder labelled X-Men The Official Game Demo
7. Left-Click once on the plus sign next to a folder labelled Profile0
8. First double click on height and change the value to your desired height ... i.e. 3840 ... using Decimal under Base ... then click ok.
9. Second double click on width and change the value to your desired width ... i.e. 1024 ... using Decimal under Base ... then click ok.
10. Now you can close the registry editor.
Start the game up it should be running with your chosen resolution ... :D ... the FOV is automatically adjusted ... :D
Some screenshots ...
4:3 ...
TripleHead ...
