Hi Stuart,
You must understand that a Registration is only a set of instructions.
It doesn't contain any Styles, Voices, Songs or the like.
It only tells the system what parts to activate and where to look for external Styles, Multi pads, Voices...
So, if you copy a Registration from one keyboard to another, it doesn't include anything, it's just a list of directions.
As long as everything pointed to by the Registration is part of the keyboard (internal Styles, Voices, Pads...), everything will work just fine.
But if the Registration points to external files than these files need to be copied as well, and the Registration must be changed accordingly - if needed.
Maybe your Disco Inferno.sty was saved in a folder on the Hard Disk of your Tyros and the Registration that was made then, points to the file in that folder.
When you now activate button 1 of that Registration, the system tries to find the style using the OLD instructions, but that won't work, because the Genos doesn't use a Hard Disk anymore.
It now has an SSD (Solid State Disk) but that uses a different address than the Hard disk on the Tyros, so the instructions in your Registration will not find the needed parts.
And, you cannot simply copy everything to the SSD either... it's quite more complicated.
For now, as suggested before, you should copy the Style to the USB stick.
Open the Registration and activate button 1, select the Style section and locate the Style on the USB, then press Memory + Button 1, this way button 1 points to the Style on the stick.
If the Registration uses more buttons, repeat the actions. Finally, don't forget to save that Registration or you'll lose all the changes you made.
Regards,
Stijn