[otrs] OTRS installation..

I was wondering if someone could help me--- I've never used OTRS before, and I was hoping to be able to get my company up on it. The problem seems to be that after I install the RPMs, all of the paths appear to be different than the paths described in the install instructions. Has anyone else had this problem? I'm using the mainstream YUM repositories, so I don't know why I'm having this problem. Dustin