Help for a newbie!

I checked the routes file but didn't see what line I shold change. If my domain is www.thisdomain.org and in the root directory there is a directory "myroot" and the default codeigniter files are loaded into that and the upble files as well, what should the entry in the routes file be? I think once I can get past seeing how it works it'll make more sense. Thank you for your help.