To change the password on a user account, go to control panel, user accounts, change password. Write the new password down somewhere so you can reference it if you need to?
The size of the data on the bootable recovery DVD-RW is 1.16gb, but on a flash drive there is the ability to save updates.
Creating Norton Bootable Recovery Tool on a USB drive.
You mean so that anyone with a NBRT CD could boot any windows system and change the passwords, or add a new administrator acount to access any system?
If that is what your asking then the answer is no.
The NBRT is built open WIndows PE, basically a windows recovery or startup repair disk. Microsoft only lets you make those changes from a logged on administrator account and not from a PE disk ran "outside" of the installed version of Windows.