Well one of the big features of beta 35 is the addon system. This allows people to make content for tome but don't want to get it added to the main game. Addons should be compatible but there could be conflicts in fringe cases. to use an addon simply copy the folder to the addon directory in tomebetaXX/game. I have written two addons at this point in time ( my goblin race is converted to this format and the new Wraith race). Other addon(s) are being made so there should be a couple when release happens.

here are the two I have finished
Wraith: http://www.mediafire.com/?rwe69fkq1dghlrf
Goblin: http://www.mediafire.com/?20mc63pg12ar1en

I plan to convert everything I have done so far ( deathknight ,liches and some other stuff)
If enough people clamor/ask I am up to writing a tutorial for the new system (and creating content in general) for the wiki