HTC TyTN / 8525 / JasJam (Hermes)

I am needing a pda phone so very seriously considering this phone. I have read most of the threads re:8525 and it sounds like the phone that I want. I know that for business use mp3s are not high on a person's wishlist- but I have a few that I like to identify my family members calls- so....is it possible to use mp3s as ringtones or are the ringtones limited to the 30+ ringtones that come loaded on the phone? TIA!