Sadly, while 3dripper launches the game and shows "ready to capture" on the corner, it captures absolutely nothing. No 3dr, no obj, no texture, nothing. But let's not lose heart. There are still two other options.
Option 1: Some guy on youtube named KingDracoon has uploaded the game's music. The sound quality is too good to have been recorded from speakers, and you can hear no other sounds during the vids. So either that person turned off all sounds except for the music and used a recording software, or he managed to open the music file. Someone you could contact him and ask him. I'd do it myself, but ever since google bought youtube loging is has become a pain I avoid.
http://www.youtube.com/watch?v=6RO86GKUPlA
Option 2: Some time ago, someone posted pics of a WFC to Gmod WIP, but has neither posted any updates, nor has he expressed any desire to share his work. However, I don't think he'll have any problem with telling how he opened the xxx files. Especially if he gets some credit for it. The only problem is that to register to Gmod, you must first buy the mod (or torrent it from what I've heard) and have Steam (I think).
But I can't find the topic now though...
I think both options are worth a shot. If any of you decides to try, then say it. No need to bombard a guy with pms about the same thing.