Irule to laod balance based on soap session ID

Hi

I have a request to search a soap message for the session ID. Based on the first 2 values in the ID I will then need to send the request to a pool member. Below is an example of the message. If the starts with 01 then go to pool member 1. If the starts with 02 then go to pool member 2. if there is no 01 or 02 then load balance normally(round robin) across the 2 servers .

Any assistance will be helpful

http://schemas.xmlsoap.org/soap/envelope/" xmlns:SOAP-ENC="http://schemas.xmlsoap.org/soap/encoding/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">http://www.eskom.co.za/IAM_MyEskom/">MYCOMPACUST01S1441888421150m4j07NyGit506Z377zDe81FHkA0U0yO9iibnFXUN8852755my@gmail.com