Sorry, Fran.... better read those reviews again.

GW-8 ships with a playlist editor (for the MP3/WAV/AIFF player and SMF player) and a Style CREATOR software, which is a simple MIDI to Style conversion software. There is NO style editing, you can't even access the ROM styles.. (that's one way to stop them being converted to Yamaha!)

I suppose, if you were extremely dedicated, you could make a MIDI file of the style playing, laboriously record each Intro, ending, variation and fill, in each of the three chord types, edit it in a sequencer, and then use the software to stitch it all back again. Perhaps you MIGHT be able to find the sys-ex codes to control the MFX of the style parts somewhere, and adjust that (nowhere are these codes given, mind you).

Depending on how good a job the MIDI to style conversion software is, you MIGHT be able to get the style to work OK (most, IMO, are not that good)...

But that doesn't make it a Style editor by any means... How many of us would be willing to go through all that just to change one Part sound in a ROM style?