Clearing Outlook's Auto Name Completion

I'm using Outlook 2002, and want to remove some of the names that appear as I begin to type the email recipients name (it's the "Auto Name Completion" which is seperate to the "Auto Name Check" function)

I know how to tun off this feature, but as it is quite handy, I want to leave it running. However, it seems to store every single email name I've ever used even if they are incorrect, or no longer in my address book.