yup, as haveacigar has already stated, clonedvd2 does not bypass ANY protection. anydvd does that part.
no need for dvd shrink. (although i still keep my copy of shrink hanging around for sentimental purposes )
www.slysoft.com and the help file of the programs themselves have a lot of the basic information you've been searching (about CSS, etc.) give those a read...you'll learn a lot!
in regards to you being logged off of XP, do you have administrative privileges? if not, find the admin, and have them log in and change the multiuser settings.
i don't know what the exact setting is but it's something like "log user out if idle" or something similar to that...
this is probably in place for security purposes. i don't know if you're at an office or what, but i certainly wouldn't leave myself logged in with the computer unattended in any type of work or school environment. it's for your own safety!
if you're at home then it's probably more for privacy purposes...talk to the other users about changing the settings...they probably like it the way it is...that way other people can't get into their email and whatnot if they forget to log out...