A while ago I collected all the mods I have ever downloaded for Dungeon Siege and made a package with everything:

Now with the latest version of my Maps & Ressource Manager

I made a simple how-to-guide on how to get Dungeon Siege to run on Windows 7, Windows 8.x and Windows 10:

With the DS Console Toolkit  and the basic editing tools:

NOTICE:  This is an addon package, which means you will need to have  Dungeon Siege – Legends of Aranna  already installed and I seriously doubt it works with the Steam version.

The package is just about 1 GB.

In case you need more manageable bites:
Zhixy’s DSLOA Addon 1
Zhixy’s DSLOA Addon 2
Zhixy’s DSLOA Addon 3
Zhixy’s DSLOA Addon 4
Zhixy’s DSLOA Addon 5
Zhixy’s DSLOA Addon 6
Zhixy’s DSLOA Addon 7
Zhixy’s DSLOA Addon 8
Zhixy’s DSLOA Addon 9
Zhixy’s DSLOA Addon 10
Zhixy’s DSLOA Addon 11
Zhixy’s DSLOA Addon 12
Zhixy’s DSLOA Addon 13
Zhixy’s DSLOA Addon 14
Zhixy’s DSLOA Addon 15
Zhixy’s DSLOA Addon 16
(Just un-zip them into the same folder)

 

Finally, here is a video on how to make Dungeon Siege run on Windows 10: