OK, so give me a reasonable hand that he might limp in from that position and make that raise from on the flop that you beat. I don't really see one. I think about the best you can hope for there is A [img]/images/graemlins/heart.gif[/img] Jx. And that's about 50-50 against your hand.

Personally, I either fold to the raise on the flop or check-fold the flop. You're in a tough position and will be a race at best against any hand that will call that 100 bet and will likely be behind any hand that will raise that flop.