Plesk and SuexecUserGroup

[Deej]

Hi, I was curious if you guys could help me with a little issue concerning configuring various php suites with different domains. Plesk uses SuexecUserGroup's and some of these php suites like Joomla or eGroupware needs the /var/lib/php/session (for using php sessions) writable by the SuexecUserGroup. First, I have to add an entry in my vhost.conf to have that directory as a base_dir so the php scripts can find the session directory, but I need to chown the directory so it is writeable by the SuexecUserGroup. My question is how would I be able to do this for more than 1 domain so /var/lib/php/session is writable for differnt SuexecUserGroup's?

Thank you.