I bought and run medieval total war II and kingdoms in Steam a week ago. Before that some years ago I had the game without Steam and played SS older versions without problems.
Im sorry to open a new post but I checked the forum for help and still coundt make it work well. I installed the 3 parts of SS6.3, the installer patcher and then SS6.4 and didnt work.

Then I started to read the forum and found the UAC problem, I solved that problem and still didnt work.
I already changed the launcher name, and changed the steam kingdoms launcher to @mods/...
When I try to launch kingdoms from steam, I can see the screen of the mod (the unmasked knight templar) then it loads a little, but nothing else.

I uninstalled everything (both the games and mods)then I run a scandisk, installed everything again and the mod still doesnt run.
I always install everything on "C/:program files/Steam/SteamApps/Common/Medieval II total war" thats where the game is on Steam. Im not sure if the problem is there.