Hey Ross,
I've spent the last week reading all the previous threads in the Psych. forums and, without a doubt, everyone seems to worry that their scores are "not good enough". However, after reading the previous threads, I am convinced that scores are NOT the primary concern in Psych.. Now, having said that, I would encourage you to apply to many schools -- if you get more interview offers than you can afford/want, you can politely decline the less desireable ones.
Just to give you a bit of hope: there are several individuals who have posted their Step scores, to emphasize that their scores did not keep them from interviewing at several prestigious institutions!
Hope this gives you hope!