fraxt660

I'm currently riding a XT660X for the fun of it, but I'd like to change the excel spoked rims for some mags. Is there anybody technically minded out there who can tell me if it's going to be a ball ache? And if not, give me some pointers. I've seen marsesini rims (however it's spelt) but for over a grand I think these are out of the question. Cheers in advance.....

Just thought I'd be polite and say hello before I start asking daft questions. So hello.