[Serusers] Forcing TCP using exec_dset?

Hey All, We've got SER deployed as a man in the middle proxy situation where both sides need to be talking TCP. The problem here is that there is a LOT of NAT going on between the client and the eventual end point that unfortunately cannot be removed from the situation. Right now I've got everything fixed up and working for whenever clients send messages so that all the fixing up and rewriting takes place and then transaction kicks in and the rest of the dialog completes as expected. The problem comes in when the far end server sends a message to the client. I've got a script on the backend that builds the correct URI and passes it back to ser using exec_dset, the only problem is that exec_dset() followed by t_relay() forces the packet to be sent via UDP, which the client is not expecting and thus it times out. I've tried appending ;transport=tcp to the URI that the script returns however I get routing errors when I do this. Is there anyway (without using t_relay_to_tcp()) to force the packets being sent to use TCP? -Evan