Well I went ahead and stopped the process as it had hung for well over an hour. I also unplugged the phone and now have it sat in it's cradle. I am not sure if it is charging but I think it is as it has come up with the Sony Ericsson splash screen which stayed for a few mins before the screen went blank.

No idea what will come of this but I have resigned myself to the fact that this might be a one shot deal which didn't work.