I have used Xsplit for awhile in Wirecast. I use to use it to bring in my co-host over Skype. It was way better for me then DTP. If you want a free solution to Xsplit then use FFSplit! It is just as good if not better then Xsplit and it is free and will show up as a camera in Wirecast.

http://www.ffsplit.com/