After installing updates-Removing user-opens to Welcome screen

As the title says, I am setting up a computer for a relative and since the time I worked for Apple, I have forgotton the terminal commands to remove the test user I set up and reverting back to the welcome screen so the new user can set up the machine from scratch. I looked around here and could't locate anything pertaining to this specific issue using 10.7.X. I am not sure if the process changed since 10.4 or 10.5 but hope someone on here can assist me.


Thanks Much!

iMac, Mac OS X (10.7.3), 27" 3.4ghz. Core i7