What you need: S3OC, S3PE, and the EP/SP with the items you want to clone
Difficulty: Easy!
What items will work: Most things will work including hair, makeup, objects, etc. Even scripted objects will work as long as they are not EP specific (e.g. pool tables, fish tanks, hot tubs, spring riders, etc.).
What items won’t work: Scripted items that are found in only one EP (e.g. LN bars, IP boats, LN instruments, etc.). ETA (2013-09-12): maple–apple discovered that outdoor plants turn out black and distorted in game when cloned. Also, rabbitholes work but their icon in catalog is blank so a making a custom thumbnail would probably be for the best. Rabbitholes are located under Objects in the S3OC cloning menu according to their function (Diner, School, etc.).
(The pictures above correspond to each step in chronological order; the steps also are labeled in the pictures’ captions.)
1. Open S3OC and click the cloning tab. Choose the category depending on what type of item you want to clone.
2. a) If you are cloning an object, find the object you want to clone in the list. Then click the Clone or Fix… button.
2. b) If you are cloning a CAS item, find the item you want to clone in the list. For some reason, the clothing categories sometimes show up wrong in S3OC. Keep that in mind, then click the Clone or Fix… button.
3. a) Check the boxes marked in the picture and then click the Start button. You will be prompted to select a directory to save the file to. Then your package will be created.
3. b) Check the boxes marked in the picture. On the right-hand pane, select the correct categories for the CAS item. Then click the Start button. You will be prompted to select a directory to save the file to. Then your package will be created.
4. Open up your newly-created package in S3PE. Double click either the OBJD or CASP instance depending on whether you are cloning an object or CAS item.
5. A window will appear. In the second field for the group number, delete whatever numbers are there and replace it with a zero, then click OK.
6. Check to see that the group number of the OBJD/CASP has changed to 0x00000000. Then save!
Source: I learned how to do this from this thread on the Simlogical forums.
Let me know if anything is unclear or incorrect!
