How to get session data into CS Cart?

Hi,



I am testing something against the CS Cart beta before buying to confirm it is possible…



Basically I have some PHP session data this is unique to a particular user…



I need to get it into CSCart somehow. It is basically a long session ID key.



Any ideas on how this is possible? Simply adding Session start to CS cart does not do it due to the in-built session management.



The only way I can see is via the URL, which is messy…



Any ideas much appreciated.



Thanks!