People will be much more likely to download smaller files, so I would suggest that after you got the files converted. You find a way to cut them up into smaller pieces, finding a artistname and naming the "songs ?".

If this isn't covers and copyrighted samples. I would suggest you also have a look at

http://www.sectionz.com

It's a site where unknown artists can upload their songs for other people to download. It's also a community for people that enjoy making their own music. You might even find help on the conversion issue there

I'm not a musician myself, but download music from them sometimes. People will not have to pay for downloading your music. downloadspeeds are high, and just maybe some of them share on P2P networks as well

good luck