jethro -
I use various online and software programs to trim my mp3's to something that is less than 30 seconds. I wish I could tell you the website I use or the program I use, but it really depends upond the day. Today I used a website called
http://makeownringtone.com/ that let me upload my ringtone and trim it where I wanted the ringtone to be - the beginning, middle, or end. I always tend to shy away from downloading programs to my computer because I always seem to pick the ones with the trials periods!