[phpOpenTracker-User] HELP! Hacking source to figure out how to set cross domain / cross subdomain cookies and sessions

Okay, so I have many domains and each one has an unlimited # of
subdomains.

 

I manually set the document and client_id of each request, so the domain
a.com will always be client_id 1 and the domain b.com will always be 2.

 

The problem is if I go to sub1.b.com and then click on sub2.b.com it
logs it as a separate domain, and therefore a spereate visitor.  How do
I stop this from happening?  A real example is:

 

artist1.calabashmusic.com -> artist2.calabashmusic.com

 

I log the documents as /artists/artist1 and /artists/artist2 and the
client_id as 1.

 

I want to make it so the app doesn't see these as two different domains.

 

Any help??!?

 

Thanks in anticipation from a back hole of a mailing list.

Jacob