BSAopt

This is a tutorial on how to extract .BSA format files into an easier to use "Loose Files" version. Skyrim's new method of loading loose BSA files (i.e. those not defined in Skyrim.ini) is to simply load them in alpha-numeric order regardless of conflicts. This can introduce a lot of problems if you're using multiple mods, especially with the amount that are in STEP.

1. Download BSAopt here. Inside the archive you'll find BSAopt x32.exe and BSAopt x64.exe. According to your operating system (if you're unsure then use the 32-bit version), extract the correct EXE to your Skyrim root folder.


2. Create a new folder. It doesn't matter where as it's just a temporary folder, your desktop works fine. In that folder, place the BSA file(s) you want to unpack.
   


3. Run BSAopt and click Browse in the upper section. Navigate to the new folder with your BSA files and double-click on the BSA you want to extract.


4. In the lower section click Browse and once again navigate to the new folder, but this time click Use Folder.


5. Click Unpack and when it's done there should be folder structure similar to that in Skyrim's Data folder (Textures, Meshes, etc.) That's it! The new folders can now be installed like any other mod, just throw them in your Data folder, or in their mod's folder if you're using Mod Organizer. It's also now safe to delete the BSA files and the temporary folder.


6. (Optional) If you have multiple BSAs in the same mod, simply repeat steps three and five (there's no need to repeat step four unless you want to keep the files separated).