Oscar (creator of DAP) is working on another cool tool called Photoblend which makes creating montages child's play. It's still in beta. I PMed Oscar to see if it was alright to share links yet, but never got a response. This software's too good not to share from the results that I've seen other folk do with it already. I'm not into photo-montages so haven't participated in the beta test (and probably won't), but I know many folk here are into this form of retouching. It's definitely worth a look imo. The thread at DAP is located below and after you read through the thread, you will find pertinent links too, but I'm including both below.
http://www.mmbforums.com/viewtopic.php?f=5&t=1321 (very cool info)
http://www.mediachance.com/photoblend/index.html (again, still in beta)