You do not need to be a supporter to link to your photo albums. However if you wish to keep using attachments you can delete older uploads by going to user cp, and clicking on attachments in the left menu (last item).
Any time you want to replace the text that displays with a link, use the following code (minus the exclamation points).
!How to become a self taught expert on anything[!/url]
The link to google being the link, and the 'how to become a self taught expert on anything' being what shows, as below
[URL="http://www.google.com"]How to become a self taught expert on anything