Ok, I just forwarded your info to BRS. You should receive an email soon that says the buy is open. Or you can sign into their site and when it says next to your name at the top of the page "group buy" then you are set.
You just order as usual and get the discounts automatically. You will also in the future get about 5% off most purchases, even if you dont' buy anything during this group buy.
The group buy runs from tuesday thru the next monday so you will have a couple days to save.
Hope that helps