So, I wanted to buy some of the DLCs for Mass Effect 2, for the PC, but have absolutly NO idea what I'm doing. I've already wasted $20 on the DLCs...for an Xbox I don't have. Can anyone shed some light on this for me? I know I need Bioware points, but can I buy them on a prepaid card? Thank in advance to anyone who bothers to help morons like me.