Need Help with scraping project!

Hey,

I've successfully scraped about 10 sites in the past. I'm trying to do another, but this new one is really doing me in.

The site I'm trying to scrape is

http://www.walgreens.com/storelocator/find.jsp

I'm trying to get the store addresses for a list of zip codes.

However, i keep getting the error on the last response output "your session expired." I figure it has something to do with the cookies, and the JSESSIONID which I have no clue how to pass through.

I'm running version 2.7.2 - Basic Edition, on WinXP Pro SP2.

Thanks in advance for your help.