[BritSteve]

If you still have access to the customer side, and have a utility like phpmyadmin, you could probably do the following.

Create a new customer/member account with a password
Make a note of the password you used.
go into phpmyadmin
find the new customrt row.
Copy and paste it into the password field on the admin row.
Log into the admin area using the password you wrote down.

I can't see why this wouldn't work.

Steve