Great site.
Even with the beforementioned tips, EMS still might not be available (was not for me). The solution I found here:
http://www.columbia.edu/~em36/wpdos/emsxp.html
You have to disable Legacy USB support (or in my case USB Keyboard support) in your system's BIOS settings.
Now, can anyone explain to me what EMS and USB keyboards have to do with each other? no idea.. anyways, the game works now.
Have fun with a great game!