I'm just gonna try to make one more push for Black Dahlia which is a great FMV Windows 98 era adventure game. I'm sure you've either played it or read great reviews. Good cast, great story and some hard puzzles.
I'm including the exe if you'd like to look at it. The game kinda worked on xp (I'm on Windows 7 now) but it was too fast on some segments and I saw that you addresed that particular problem in some other games. Also I think the game would benefit from your DirectX video processing skills.
Cheers,
M.
P.S.: Sorry it's in 7-Zip format, but RAR and Zip can't shrink it to the maximum 256kb you allow as attachments.
P.P.S: If you want to look at some other old adventure games, send me a pm or email and I'll be glad to find you an exe. I have a rather big collection.