Frank,
I really don't have to do much if anything to many of the styles if I use OMB in it's GM mode with a GM module or soundfont. If I need to adjust velocities or effects, I find it to be much quicker to do using the tools in OMB vs Michael's software.
I still like Michael's software for making new styles though.
Starkeeper - sfpack is available here:
http://www.soundfont.de/english/download/ Regards,
AJ