Most of the DnD 3.5 rules are open content, you can find them in the System Reference Document (SRD).
A very good online version can be found here:
[url="http://www.systemreferencedocuments.org/35/sovelior_sage/home.html"]SRD 3.5[/url]
As the game has no rules reference i hope you find this link as helpful as I do with my years of DnD experience and a shelf full of books.
Moved from Neverwinter Nights 2 to Dungeons and Dragons.
Listen up maggots, Mr. Popo's 'bout to teach you the pecking order.
It goes you, the dirt, the worms inside of the dirt, Popo's stool, Kami, then Popo.
~Mr. Popo, Dragonball Z Abridged