what issues should I consider in publishing transcriptions?

[Chip]

I have about 70 transcriptions I and a band-mate have done of Mexican 
music, in the Cumbia, Banda, Ranchera, Zapatiado, Quebradita styles. 
What issues should I consider if I were to pursue selling these 
transcriptions? I was thinking via the web and maybe a 'fake' book, or 
both. What are the legal considerations? These are our own 
transcriptions/arrangements, taken from recordings. I have used Lilypond 
for typesetting all my parts, my friend has used a windoze based app for 
his. I would take his and typeset them in Lily for the 'official' 
releases. I have seen some people mention their own publishing of works 
done in Lilypond.
Thanks for any/all input,
Chip