Hey people, i am currently on loan a mac book with mac os x 10.5.6 installed, now because it is loaned my account is mobile and i have no admin privligies in saying that there is an admin account i dont have access to, now bacuse i got up to mistchef the other day i created a new admin account and now want to delete it. i have allready tried making my account admin then deleting that one but for some reason some of the system prefss are still disabled on my account which is mobile, admin now. is there any way to delete the new admin account thorough terminal or somthing ?

all help is appeciated