So I have the original M2TW, but I was curious if I could put SS on that and just use one of the Kingdoms discs to play the mod
When you install Kingdoms to your M2TW they update the game and put each expansion into the mods folder. When you install SS6.3, it goes into the same folder, but it draws resources from those other mods, so you need them all. To play SS you need to use the second Kingdoms disc.
Does this clear it up?