For the myriad number of GW-7 users out there, Roland has released version 1.0 of their GW-7 Style Converter for Windows (2000 & XP). This software converts standard MIDI files (format 0) to GW-7 style files. You can use pre-existing MIDI files or create your own MIDI files within a sequencing program. A manual is included, which explains the entire process.

Find it here:
http://www.roland.com/products/en/GW-7/GW-7_World_Styles/index.html

Michael