The page you linked says it all. That PSU does
have two "normal" 6 pin PCIe connectors, along with two 6+2 pin (or 8 pin, if you will) PCIe connectors, for a total of four
6 pin PCIe connectors.
Look at the "Total Output Connector" section on the Feature page...
You're good to go.
Edit: Even if it did
just have four "8 pin" PCIe connectors, they're 6+2 type connectors, so you just leave the "+2" part out of the equation. It's completely separate from the 6 pin part.
Edit 2: Having said all of that, that is an absolutely terrible PSU. Take a look at Tier 5 here: http://www.eggxpert.com/forums/thread/323050.aspx
The good part to that is that you won't really be stressing it much with only a single 560. The bad part is that it could still self destruct at any moment.