TUTORIAL: Sims3Packs to Packages

To convert Sims3Packs to Packages you will need Delphy's Multi Sims3Pack Extractor.

Installation
Installation instructions can be found in the Overview page of the tool

Usage
Copy all sims3pack files that you want to convert in a folder of your choice (in the picture X:\Sims). All files that the tool finds in this folder are being converted automatically. To set this folder in the tool choose browse in Step 1.

In Step 2 you can choose where you want to extract your files to. I recommend to choose another folder than the mods folder to extract the files to (in the picture X:\Sims, too)

Now you have to decide what you want to name the package files. You can name they way they are inside the sims3pack file. These are cryptic names. To do so, check the option rename file on save. If you do not check the option, the package files are named the same as the sims3pack. This is only true if there is only one package file inside the sims3packs. Houses and Sims have more then one most of the time.

Now click on Extract and you're done.

Now copy/move all files you want to keep to the Mods-Folder.

To convert package files to Sim3Packs you will need TSR Workshop but I have no clue about that.