LWP and proxying/authentication??

hi there.

quick question.  i am trying to use WLP::Simple's getstore() function  
to save .htm pages.  the site i am trying to access is password  
protected, however, and i have to proxy in order to access it.  when  
i try a non-encrypted site, the code works fine, so i'm pretty sure  
this is the problem.

here's the deal.  in my system preferences, i have auto proxy  
configuration selected, and the following url included http:// 
library.stanford.edu/apcproxy/suproxy.pac

when i try to access the site in question (or any other stanford-only  
site), it redirects me to a page asking for my username/password, and  
then forwards me on to the originally requested page.  after i do  
this once in the browser, i no longer need to do it again.  i was  
hoping this would mean that my perl program would be ok, too, but it  
looks like that's not the case

i'm hoping there's a library that will allow me to fix this problem.   
any help, sample code, or links would be greatly appreciated.  thanks!

eli