Strange, but I find the bass and drum parts the easiest when doing a style from scratch, but I play drums and bass so I know what I want.

The chords and phrases require setting note limits, and they have to be played in over one chord, which is unnatural for most of us keyboardists, as we naturally want to do progressions.

Most arranger players are content to learn how to swap parts, or change voices, and effects...that's been my experience, and I've been doing clinics for quite some time.

The next important things users want to know (at least my clients) is how to re-voice and edit and/or transpose a commercial SMF.

Luckily there are forums like PSR Tutorial, and YPKO to help with other aspects of the instrument, but in my experience, my clinics are usually about style and SMF editing and sometimes a bit about making user registrations or adding tunes to the Music Finder.

Ian