Overdrive Media

I just bought a Zune 30GB player and am downloading books of the my state library using Overdrive Media.

The books expire after 14 days. I wanted to know if there was a program that would take that expiration date off the book so that I can keep it till I am done listening to it??

I would really prefer a free program or something extremely reasonable.

I don’t want to burn it or anything, I just want to keep it longer…

Thank you for your help…