Actually Melissa is right.
However first time i tried it, it wouldn't show any other profiles so i assumed it wasn't cross-network aware.
But having tried it again it did indeed show ALL profiles from ALL networks. I chose the copy from other profile option and saved the page, however it sat at the "saving" stage for well over an hour. I refreshed the page and the profile was there all ready for me.
So, case closed, many thanks for your contributions guys.