LG VX-8100

I read on a post a while ago that someone was able to actually make the phone think that the ringtones were on the sd card. ie. change the directory of the ringtones to one that is on the sd card. He said you had to open up the myringtone.dat file with a hex editor or something? I don't know if any of you phone hacker specialists out there have looked into it more but just food for thought I guess? Unless someone has figured it out