I need to try this. Age of Empires II was never really on my radar until I recently learned it's engine is the basis for another game I'm a fan of - Star Wars: Galactic Battlegrounds. It's one of two RTS games released in 2001 that I've spent a lot of time on, with the other one being Emperor: Battle for Dune.
Emperor: Battle for Dune is impossible to find nowadays. It was fun game though. Same with SW: Galactic Battlegrounds. Short of piracy, you can't get them.