OMG, I wish I had that problem ! If you can remember the name of the program you downloaded, I'd really appreciate you telling me, as all my ring tones are ridiculously low in volume !
I do have a solution for you though, download a copy of
Audacity and run those Mp3 files through it. Edit> select all (for the file) then go to effects, and select "amplify". Then adjust the gain levels by lowering them so that the wav form is not maxed out. You can play it each time you adjust it in order to see if it suits you better.
Doug