Odd pagenav question
 

I am building a sports script
I copied the $pagenav function into a php and changed the template_name that it is calling so it could display "Week of" instead of "Page of". My question is: Can pagenav be made that instead of displaying page 1 of ... for the first result into displaying last page first (but for first result).

Example: Week 8 of 8 Weeks will display the latest.
Next will go into week 7 and so one.

Display is the same. It's the numbering I need to be reversed.

My test example

Anyone? Is this possible, what I'd like to achieve?