Paul,
You could easily save 200 registrations in the keyboard memory, however, you would max out the memory with less than 40 styles files added to the registrations. I would suggest taking a look at
http://psrtutorial.com/lessons/playing/regist/10regGD.html where I posted detailed instructions on creating registrations. It should clear up many of your problems.
Good luck,
Gary

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PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!
K+E=W (Knowledge Plus Experience = Wisdom.)