George K....The new Styles from the PSR2000 & CVP209 can in fact be loaded into the PSR9000 & 9000Pro.
A number of the the session styles that you mention have an extension either.sst (session styles) .pcs (Piano Combie Styles .pst (Piano Styles). If you use a PC to add .sty to the end any of these styles they with then load into the 9000's
I speak from experience having done just this to load into my 9000Pro. The odd style may produce an unusual bass hum when playing a minor chord, but this can be put right by either re-voicing in the 9000 style edit or deleting the system exclusive using Cakewalk.

Graham UK