In any case, I had the software that I needed, so I installed it on my wife's PC running Windows XP. That done, I had a couple of old PCs running Windows 2000, but those are on the same KVM with my wife's PC, so they couldn't be used for multi-player. The problem was Windows 7. I had heard that it wouldn't be pretty (you have to shut down Explorer to play), so I decided to virtualize. That way, I wouldn't need to give up any part of Windows 7, even Aero, and it would run seamlessly.
I had used VMWare before, so that's what I started with. VMWare Player is free to download, and so I did. The installation went pretty smoothly. I chose to install the option to install the OS using the VMWare wizard, which turned out to be a problem later on when I had to manually eject the virtual floppy drive in order to be able to install VMWare Tools (VMWare thought that the OS installation wasn't complete, when it was.) Next time, I'll choose the option to install the OS after creating a blank virtual machine.
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After that, I was good to go, so my wife and I fired up the game and played a few matches. We had to brush up on our skills first, but it didn't take us long to get back into the swing of things.
I used Bridged mode for networking, but even so, I had to disable Windows Firewall on the XP VM in order to host an AOE game, even after creating a firewall exception, and expanding it to the whole subnet.
Of course, it wasn't perfect. Even though I had VMWare Tools installed, the mouse was a bit unresponsive, and VMWare Player tends to release the mouse if you cross the edge of the screen. For this reason, and because I also wanted to try another option for virtualization that I hadn't used before, I decided to also try out Virtual PC.
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Windows Virtual PC with the Integration Tools installed has almost perfect mouse movement, which is essential for playing a real-time strategy game such as AOE. It wasn't difficult to get used to hitting Ctrl+Alt+Left to escape input capture, instead of VMWare's Ctrl+Alt.
I do have a license for Windows 7 Ultimate, so I would like to check out Windows XP Mode. However, this license is currently installed on our living room media PC. It will take a few hours to set up, so it will probably have to be a free afternoon on a weekend. If I installed the key currently on my laptop on the media PC, I might be able to use "Anytime Upgrade" to install the newly-unused Ultimate key to my laptop without doing a re-install. We'll see.