You could do it by editing the database directly by changing the username and password fields for the admin. Of course, that means that any posts you have made would be linked to the new admin.
Another solution (again v6.34) would be to edit the pages that look for If lngLoggedInUserID = 1 and change those to the id number of the user you want as the admin. An easy way is to use a WYSIWYG editor like Dreamweaver and use the find and replace function.
I'm not sure on v6.32, but on one of my v6.34 boards I have set a 2nd member to be able to have admin functions by editing the pages to have an "or" for the logged in user ID. It works out fairly well.