LG VX-8100

OK, I've searched long and hard over at howardforums, and haven't found the answer there, so I'll try here. Has anyone figured out how to delete the "stock" ringtones that come with the phone? The ringtones numbered 1 - 10? I've tried via the newest version of bitpim, and I can get bitpim to see the ringtones I've put on there, and I looked through every folder in the file system to try to find the stock ones, but as you can guess by this post, I haven't had any luck. Anyone figure out how to do this via bitpim or any other way?

Thanks in advance....