I'm having some trouble, I just got a 2.5 RS that was hacked to hell and I can't figure out the gas tank. I have the fuel lines correct, but all of the vacum hosses going to the "breather box?" (not sure what it's called) are all cut. I bought new hoses but don't know the setup. Can anyone help or do you have diagrams?

Depends on year.....you need the correct diagrams.

It is a 2001 2.5 RS.

Can anyone help me?

Bump.

The fuel separator lines should look something like this
http://www.surrealmirage.com/subaru/images/swap/04/default.htm

Here's a few misc pics
http://www.surrealmirage.com/subaru/images/swap/07/default.htm

Basically you have two vent lines coming off the tank. They go into the bottom of the fuel separator. The third line that comes from the top of the separator then hooks into the hard line that connects to the evaporative emissions system.