I don't mean to worry you, but if you can send all your items back and get a refund that is probably going to me your most profitable options.  Based on the following reasons.

1, Profitability of scrypt mining has halfed over the last 1-2 weeks, you will be very very lucky if you see ROI
2, It's only going to go down hill from here with the first asic scrypt miner out.
3, Which I think is my main concern is you've gone out and spent about $15,000 - $20,000 on mining rigs which you've asking some basic question about how to use and set up.