Thanks guys. These damned proms have been doing my head in man..As I said, they were going to require further thought; well I'm over it lol. Finally figured it out I hope..
Hey thanks Ralph. With the proms, I was doing it in reverse - Prom image placement over the top of the standard disk image (cutting out the central disc first of course!) And then the penny dropped...Do it the other way around Asi, you drip lol!
Sorry John,
I could have helped there, but the penny didnt drop here either.
I have always found it easier to transform the disc than to resise the proms. In Photoshop CS6 anyway.