Need help re-structuring library!!

i have all my music organized into album artist/album/track title right now, the media player default. I just went through and made my library's tags impeccable with album art attached to all files and all that jazz. what i need help on is figuring out the string to use so i can pretty much just restructure the whole collection the same way "band/album/track - title" so that it's pretty much the exact same so i can just replace the old library. also, id like to extract the cover art from each file so that theres just one jpg in each album called Folder.jpg. can anyone give me some tips about how to go about this?