I have a question about the non-obvious fields below (fields 1 - 4 are understood) in the users table. I need to add my own fields and want to understand whats in there beforehand.

Can anyone tell me (1) their use and (2) where/when in the framework they are referenced / updated?

IID
CUSERID
CPASSWORD
CFULLNAME
IDATABASEUTILITIES
IPRINTREPORTS
ISYSTEMSETTINGS
IUSERGROUPS
IUSERPREFERENCES
IUSERS
TLASTUPD
CLASTUPDID

Thanks,

Gary Pike.