modifying Session extension for Application variables

Hello everyone, I have been thinking about creating a PHP extension that supports Application variables for several days. This is to better support caching and shared variables. Then I realised that most of the functionality for supporting Application variables can be adapted from the session module. In fact by getting all php pages to share one session_id, application variables will work already. Setting the session id would even be a good idea as a means of controlling application namespaces. Eg. in a shared hosting environment, every host will use a different namespace for their Application variables. The only problem with this approach is it is not easy to have session and the simulated application variables active, or am I wrong? What does everyone think of this suggestion. I would be willing to modify the session code to support this functionality, or fork the session code to create a new extension for this stuff. Any suggestions, pointers and advice? Thanks again -- John Lim PS: How do i get a CVS account to do this?