Hey DC,
Since Hoster converts any ZIP file it imports to an MP3+G file, you could save some time by just converting your ZIP files to MP3+G files.
A zip file containes an MP3 file (music) and a CDG file (lyrics). When you "convert" a ZIP file to an MP3+G file there are no changes made to the MP3 or the the lyrics file, it just eliminates the zip portion.
I Hope This Helps
Jim