I dont need the CS... yet... i just want to knwo were to put the mods... When i right click the shortcut and click open file location it takes me to the steam folder, and there is no folder that says data or anything of the like... XC help!
You will find the Morrowind folder at this location: '...\Steam\SteamApps\common\morrowind'
The file structure from there is exactly the same as non-Steam installations.
You'll also want to redate Morrowind.bsa, Tribunal.bsa, and Bloodmoon.bsa to year 2002 if you intend to use any mods that replace stock meshes and textures.
If you use 3rd-party extenders to Morrowind (like MGE, or stand-alone MWSE), you'll also need to disable the Steam in-game Community while playing Morrowind in order for extenders to work properly.
See the FAQ for the http://www.gamesas.com/index.php?/topic/1083697-morrowind-graphics-extender-mge/ about running with the Steam version of Morrowind for further details.