Rar.FB! File?? WTF

I downloaded a torrent for Tekken 1 for PS1 and got this :
It won't work with emulator and I can't seem to open it.

try opening it with winrar.

It says : "Not a supported archive"

Are you sure the file has completed downloading? Bittorrent clients often put suffixes on files that are downloading. If your sure it's complete then remove the .fb! ending and open it in winrar.

I did that but now it says "The file "???" header is corrupt."

The wasn't finished downloading then.

That sucks because it took half a day to download it. I guess I'll have to start download again.

One strong possibility is that it's a 'Slim!' compressed file. It's an absurd format, I've never seen it used before, but the program for extracting it is @ http://www.bars-trade.com/slim/ . Good luck. :-\