I searched for registration info on the VR-760 and came up empty handed.  Isn't what your wanting explained in the Manual Cassp?
If it isn't it should be.  Shame on Roland for not giving its VR-760 users a complete and comprehensive Owners Manual explaining every facet of the V-Combo.  It's a pity users have to resort to online support groups to figure out how to use their oftentimes expensive Keyboards.  And in the V-Combos case, there is no user BBS to find out anything anyway.  At least not that I'm aware of.  
PS: RolandUS.com's site has user knowledge bases for some of its products but not for the VR-760.  

Best regards,
Mike
 
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Yamaha Genos, Mackie HR824 MKII Studio Monitors, Mackie 1202 VLZ Pro Mixer (made in USA), Cakewalk Sonar Platinum, Shure SM58 vocal mic.