in reply to Finding Internet Explorer proxy config

Have a look here: Proxy settings of different browsers.

MSIE's proxy configuration is stored in the registry at the key 

HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet S
+ettings

[download]
Win32::TieRegistry allows you to extract it easily. (or not so easily, but it at least makes it possible :))

In Section Seekers of Perl Wisdom