..as you can see from the screenshots above, it is not only possible to run it via Windows 7,
it is also possible to run it in higher resolutions than those supplied with the original game
- mine's running beautifully at 1600x900, the graphics detail is superb..
check out the link in the first post - it contains a detailed description of how to get DS1 running
NB: if you have the original DS1 - issued prior to the DS1/Legends Of Aranna duo-pack
- then you will need to get the Dungeon Siege Update v1.11.1462 patch from the official Dungeon Siege Site, here: Dungeon Siege
..the double-pack, issued later, already contains the update..
- then follow the installation instructions from the linked Siegecore site above..
BTW - Siegecore is good for mods and add-ons, as well..