Store $_SESSION in MySQL table

Greetings all. While trying to create a session-based advertising model that does not rely on the existence of cookies, I ran into trouble: I can't figure out how to place the entire $_SESSION array into a MySQL table row, then retrieve it and use the information from one page to the next. The best that I can do is copy the PHPSESSID into a MySQL row, then dissect the $_SESSION array so that each of its parts can be stored in a separate row of the same record. Then, with the $_GET variable, I am able to get the MySQL_last_id and retreive the information from the correct field, and it works across pages. The only problem is this: should the $_SESSION array grow with more data--say, adding a first name variable, and a time-of-day varaible--then I need to update the MySQL table whenever I do this. Not a big deal, I know, but I'm frustrated with this. One more thing: one of the variables in the $_SESSION array is an <img src> url, so it screws up the mysql insert, even when I use serialize. Thanks for any help you can give. --V