Just to give my own thoughts aftertrying NMM gold for the first time as well with a few techniques I found the Black/Snakebite -> white gave the best results so far for me, though more for an ancient/dull gold rather than a shining/yellow.
You could try try the magmatrax(sp) tutorial for SENMM gold. Looks wonderful and the tages are well laid out but recon I simply didn\'t have the required skill to pull it off, worth a look if you can though.
(Sorry, don\'t have the link to hand given this isn\'t my home computer)