I don't know about bots...that kind of bugs me too. But I use the Klesk model and sound. Not sure what I did to use it though. I kind of had the same problem at first. Probably just edit your .cfg for TA. Also SCTA (Super Configurable TA) will help you change a lot of stuff.
I play the classic version rather than the TA because I'm sick and tired of the same player sounds and body models of TA! I like the extra gametypes and weapons though... Does anyone know how to play using any body model and player sounds you wish while playing TA? Some server side variable?
Amazingly balanced CTF map. Outstanding. I've been a CTF fan more than a DM/Tourney Fan for the longest. Makes you wonder where all of this talant was before the release of TA.