Problem using transactions when forking requests

Hi,again

I am trying to build a statefull forking proxy ,but i am having truble using
Transactions.When i fork the incoming invite request ,into to two seperate
requests ,i cannot add a different ServerTransction to the second request.So
when a response arrives to the proxy i can only send one response back by
using the ServerTransaction.Also i have the same problem with the user agent
that created originally the request and sent it via the proxy.It can only
receive only one of the incoming responses.Because of that i cannot create two
different Dialogs as a result of the forked invite request. 
I was wondering if there is another way to send and receive the responses to
the forked request statefully without having to send and receive them statlessly.
Or if that is not possible how can i create a Dialog  by sending statelessly
the   invite requests and also receiving statelessly the following responses.   

Thank you Michael.