Simple MAMP/MAMP Pro VirtualHosts in Parallels / Windows XP
(This tip should also work similarly with Vista, Windows 7, etc.).
After browsing around a bunch of different forums, the MAMP site, and Parallels documentation, I was still flummoxed by Parallels' weird Shared Host networking behavior, which seemingly didn't allow me to access virtualhosts I set up with MAMP for developing sites locally.
After much experimentation, I found that the simplest way to be able to type in 'local.example.com' (or 'dev.example.com', if that's your style) in Internet Explorer on Windows, and get a virtual host running via MAMP on my Mac, is to do the following: