Thanks for the advice; since my post I had played around and got it going to a degree. I edited grub, so that rhgb is removed, and put 'single' at the end, which seemed to do what you are suggesting. The wierd thing is, that last time I booted (and chose this option), the commandline login came up, then just as I was entering my details, the normal (GUI) login screen came up. This is quite wierd - I will see what happens next time I try this.
It seems that when I just omit 'rhgb´ from the bootloader, the keyboard does not function properly. If I do a dmesg, I get loads of errors with atkbd.c saying something about an unknown key released. Any advice? should I try to reinstall X or something?
It all worked fine (same setup) on FC3...
Thanks again for the advice