Install the AVI files in Custom Installation option. Just wait and the installation will continue. It reaches 99% and hangs for a minute or so. There is what seems to be a hang on installation at the installer configuration point. Setting AA to 'Enhance the App's Setting' seemed to eliminate an occasional CTD. (eliminates bouncing APC's, fixes broken physics) Theme/music set to Off (This stops the game from accessing the CD for the Music.) Game: Self-Shading=Off, everything else On or High, 8MB textures, 1024x768. Finally got MechWarrior 3 working on Windows 7 (64bit Pro).