Program that automatically logs into a site, does a task, saves file

[8kobe]

I use one particular site quite often. I need a program that will log into this site, fill out a couple forms, and then save the resulting page. I am willing to pay for such an available software. I have found programs that can basically do everything but save the page. Does anyone know of a program that can do this?

[physics]

Check out the iMacros Firefox extension.

Or, you can hire someone to write a perl script using WWW::Mechanize.