There may be an easier solution. If you can find someone with old hardware and an AWE32 -- I just tossed mine about 6 months ago
[You must be logged in to view images. Log in or Register.] -- you can run all of the midis through winamp and output them to mp3 files. You can then replace the sound files in Titanium. It's been a while since I've messed around with the Titanium client but I *think* it supports both mp3 and midi.
For those who were not so lucky as to have played EQ with an AWE32 here is what Kelethin sounded like with that magical sound card:
http://www.youtube.com/watch?v=atHxsHPt7Fc
Here is Kelethin with "normal" sound card:
http://www.youtube.com/watch?v=ZO4_8A9Uiwg