God I hate coming on these sites and asking stupid questions!!
Aaaaaaaaaaaaanyway. It looks like it's worked. I followed the firmware upgrade instructions and even entered the source code as per instructions.
I don't want to tempt fate, but it's looking bloody good
Thanks guys (and I say that in the sense I've read a lot of posts before posting myself and in the process of twiddling and tweaking and hopefully enhancing performance, learned something too)
I'm not holding my breath yet though