Ok so I figured it out. You have to use an "MBR" partition table, then create the smaller partitions. It works great now! What a perfect NAS setup for wireless. It's giving me about 5mb/sec transfers which is as fast as I can get directly from another computer. I think the reviews said it will do around 15mb/sec which is good enough for me and I think it will work perfect to stream hd videos to my PS3 over a wired connection.
So far I'm very pleased with this router. I will report back once I have my printer hooked up to it. Thanks everyone for the input!