Most of the questions asked in this thread have been answered in the retrofit thread posted by DanGB here;
http://www.seatcupra.net/forums/showthread.php?t=139255
FWIW, my story is thus;
Had a 2007 Stylance
without bluetooth fitted. Got a VW RNS510 vers B fitted in no bother and kept all functions on MFSW bar radio next station button (see other thread linked for full details). No bluetooth in car so BT /phone capability in RNS unit not activated.
Was able to change startup splash screen from VW to SEAT one using link here;
http://www.seatcupra.net/forums/showpost.php?p=3734345&postcount=197
Now have a 2010 Facelift FR with factory Bluetooth and voice activation. RNS 510 transferred successfully from 07 Stylance to 10 FR with no issues. As FR has BT, the Bt/Phone function on RNS came up on screen automatically when connected, as does an MDI tab for the CUP/USB port. No Clock shift issues with unit either on old car with small red MFD
under fuel/temp gauges or in new car with large white MFD
between temp/fuel gauges.
Interestingly, and I don't know was this as a result of changing the spash screen to SEAT or fitting in the F/L FR, but the POI no longer shows nearest VW service centre but now shows nearest SEAT service centre! Anyone else noticed this?