You can make texts longer than 160 on stock roms, i believe..
but the touch pro uses wm6.1, and there is a forum for for registry teaks:
http://forum.ppcgeeks.com/forumdisplay.php?f=27
if theres anything that you'd like in particular, do a quick search..if you don't find your anwser, try posting in that forum for what youre looking for (Google is your friend too)
Good Luck!