Deleting my own Admin profile

Hi there. I have done a search for an answer but couldn't find anything that quite fit.
I've been assisting as co-admin on a site. I've just been doing the tech stuff not actually running the place. Yesterday I witnessed some really bad behaviour in the forum chat involving the other admin and the moderators ganging up on a member. I sent a PM to the other admin expressing my disgust and telling him that I quit. I then tried to delete myself and nothing happened. I searched through the admin panel and still nothing.
While I was doing this I recieved multiple PMs from the admin and mods in question apologising, assuring me that it would not happen again and generally pleading for me to stay. Hey, I have my uses. I agreed on strict condition that there was never a repeat of that behaviour but, just in case they stuff up again - I'd really like to know how to go about deleting myself. I know that the other admin won;t delete me. I really don't want to be associated with such behaviour as I hold prominent positions in other forums, one in particular is one of the largest on the net.
Anyway thanks for taking the time to read that saga and I hope somebody can help

Go to Usergroups>> Search Users>> Find and click your username, Then scroll to the bottom and you will see 'delete this user?'. Check the box and click save. Hope this helps.

Thanks mate, much appreciated. I'll bookmark this should they let me down again...