Update on Satnav retrofit..
Well, time has moved on and now I have a 2010 FR.
So I had to transplant the RNS510 from the old 2007 Stylance to the new car. This had the smaller-looking radio/CD unit like the new
Ibiza rather than the latest one that's the same size as the RNS.
Surprisingly, the old unit went back in without need for codes and even all the old presets were still in the memory!
Even better, the new car's radio was held in by 4 screws so I didn't need to provide the U nuts as detailed by Dan as being necessary. I still had to cut the plastic from underneath to make space for the SD card reader, and also had to cut at the back as a precaution for the extra wiring. Otherwise, even more of a straight swap as before. I didn't even need the clips for the fascia as they were already there from the old one. If you are doing this to a 2011 or later the fascia surround already installed should fit back on around the RNS!
Even better, the unit automatically sensed the BT fitted, so the phone function works now, along with displaying the heater/aircon info; it also detected the CUP stuff and now displays a new tab for MDI/Media-in.
A final nice touch -bearing in mind I have a VW sourced unit-, and I don't know is this since I changed the splash screen to SEAT or put it in the new car, but in NAV mode, POIs no longer show the nearest VW centres but SEAT ones!
I don't have any direction arrows on the BT MFD when in NAV, but if the price for this is clock shift I'll do without.
Cheers and hope this helps!
Roy