Session ID Persistence based on Session id in Soap request.......

Hi can anyone help me. I'm trying to get an I rule to do Session id Persistence. The Session ID is contained in the tag of the SOAP request. also to have a web service timeout value of 300 seconds (5 minutes) set in the I rule. Below is a sample request and I would want to do persistence based on this request using the Session id.

http://schemas.xmlsoap.org/soap/envelope/"; xmlns:ser=";