Here's a very simple guide to getting SVN up and running on hostmonster.com.
Basically just run a script and it's all set up. Also comes with a script to quickly add new user accounts to SVN.
One thing you shouldn't do--don't change the versions from those in the script. I tried grabbing the latest SVN (1.6.6) and APR (1.3.9 or something) but they turned out to have broken dependencies. So just stick with what's there in the script, and it works great.