How to simulate entries in HOSTS file with an IE 7 browser plugin

Is it possible in Internet Explorer 7 to simulate HOSTS file entries with a plugin?

For example, can you tell IE to resolve all requests for xyz.com to a specific IP address?

We have some QA testers which are testing a specific URL. They cannot get administrative access to change their HOSTS file.

Is it possible in Firefox or any other browsers?


Not exactly the same thing, but you could use a proxy server that redirects requests appropriately. Polipo and Squid can do that, among others.