Info on coloring Elite Remy

I know there were discussions awhile back (I remember Amm's posts
specifically) about how to color virgin Elite Remy. Unfortunately, every
time I try to do a search my computer times out, so I'm having a hard
time locating those posts. If you have the links I'd really appreciate it, or
if you've had experience yourself coloring virgin extension hair. I'm
needing final colors of a Level 3 Dark Brown and Level 4 Copper Gold
Brown for highlights. Thanks, guys!