Cookie structure?

[Vetmode]

Does anyone know the full structure of the vbulletin cookie?
I figured out some info (I think) but I can't seem to find what some of the other stuff is for.

bblastvisit
Time of the last visit?
forum url
screen resolution?
no idea
no idea
no idea
no idea
*
bblastactivity
Time of the last activity?
forum url
screen resolution?
no idea
no idea
no idea
no idea
no idea
*
bbuserid
the user ID
forum url
no idea
no idea
no idea
no idea
no idea
*
bbpassword
salted password hash
forum url
no idea
no idea
no idea
no idea
no idea
*
IDstack
no idea
forum url
screen resolution?
no idea
no idea
no idea
no idea
*