Courtesy of DinkumThinkum. Originally posted in the former ES Mod Forum.

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Merging mods with the Construction Set:

Always back up your .esp files first, just in case.

1. Run the Construction Set.

2. On the file menu, choose Data Files.

3. On the Data File screen, double click on all the master files (Morrowind, Tribunal, Bloodmoon) you have so there's an 'X' in the box next to them.

4. If you have any mods that use master (.esm) files, do NOT select those. Just select the masters that are from the game and the expansions.

5. Double click on the .esp files you want to merge together. If you have a lot, just do a few at a time.

6. Make sure you have an 'X' next to all the master files and the .esp files you want to merge.

7. You don't need to select an Active file, unless you want a particular .esp to override the others in case of conflicts. (The Active .esp file will load last, so any changes in that will override .esp files that are loaded earlier.

8. Now click the OK button to load everything into the Construction Set. If see a prompt about setting an Active file, just click yes to continue (unless you want an .esp file to be Active, as mentioned in #7.)

Loading the files will take a bit; be patient.

9. If you have both Tribunal and Bloodmoon, you'll probably see a lot of error messages, mostly about dialogue. This is normal (though annoying); just click past them. (If you have 'Yes to all' enabled in your morrowind.ini file, you'll have a 'Cancel' button that will get you past the error messages.)

10. Once the master files and mods are loaded, go back to the Files menu and choose the 'Combine Loaded Plugins' option.

12. Say 'Yes' to the prompt, pick a new file name for the merged plugin, and save it.

13. Close the Constructin Set and test the mod in the game.


When you use the merged plugin in the game, make sure you check only the merged plugin, not the original plugins that it includes. (Double click the original mods to deselect them.)

Note:

Add the following on a line by itself to the 'General' section of your morrowind.ini file to let you get past multiple error messages faster:

AllowYesToAll=1

It's a good idea to backup the .ini file first (just copy and paste in the same directory), especially if you're new to editing .ini files.