So you've got some morrowind mods you want to install but you have no clue how to do that. No worries, just follow these simple steps.
-Open CXG, select Configure>Manage Bottles from the Menu Bar
-Click on the bottle you have Steam/Morrowind installed on so that it's highlighted
-Click "Open C: Drive in Finder"
-In the "drive_c" folder, navigate to Program Files/Steam/steamapps/common/morrowind/Data Files
Now, a mod will usually come with a mesh and textures folder and assuming you don't have any mods installed at the moment, you can simply drag and drop both those folders in the "Data Files" folder. Important Note: If a window pops up saying there is already a folder/file with that name, do NOT replace it, click cancel. In this case there is, as stated by the notification, already a file/folder with the name of file/folder you are trying to install, you NEVER want to replace the file/folder if you get this notification as you may make the game unplayable and/or cause some errors. So to fix this, you want to open up the folder you're trying to install, and drag all the files inside the folder to the corresponding folder in "Data Files" so if the folder is "Meshes", drag the files from the mod's "Meshes" folder, into the Data File's "Meshes" folder. In some cases there will be a folder inside a folder, which may cause you to get the notification you got before, in this case do the same thing and drop the files from the mod's folder to the corresponding folder(s).
Mods may occasionally come with some extra files you may not need to install, they also come with a readme, this usually tells you which folders/files you'll need to install and which ones you won't.
Most mods come with a ".esp" file, this means you'll have to launch Morrowind, select "Data Files" from the menu, and check all the mods you want to use.
Textures
Now this is a fix for a problem the steam version has with texture replacing mods, it requires the use of the "Terminal" application so if you don't like to mess with things like that you'll have to either find a date changing application, or just deal with no texture mods and keep it vanilla.
-Open Terminal
-Type "touch -t 200205010000" no quotation marks (no quotation marks for any of these steps), do NOT hit enter
-Hit spacebar after you've typed the number, now drag morrowind.bsa from the "Data Files" folder to the Terminal window
-Hit enter
-Type "touch -t 200211060000"
-Hit space, drag Tribunal.bsa from the "Data Files" folder to the Terminal window
-Hit enter
-Type "touch -t 200306030000"
-Hit space, drag Bloodmoon.bsa from the "Data Files" folder to the Terminal window
-Hit enter
-Quit Terminal
The next time you fire up Morrowind, your texture pack(s) should be working.
Have fun,
Ryan