Michael Bedesem's Regfix program includes the PSR-S900, but I'm not sure if it has been upgraded to include the S910. Check it out at http://www.psrtutorial.com/MB/regfix.html

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.)