On second thoughts Dust, it doesn't matter! I simply used the 1.40 to 1.31 Official Downgrade patch and it worked a treat! Just backed up my Burnout 2 and it works flawlessly! (and a LOT quicker than the original at loading too)! Burning at 2x is great, and my Traxdata have stood up to it very well indeed!
So for the Firmware patches go to
http://firmwares.co.uk
and for 2x Ritek burning use the 1.31 Official patch from whichever version you currently have at the moment.
Thanks everybody for all your help...