How to copy places
From Roblox Wiki
Copying a place for your own enjoyment is simple - you can even save other peoples places. This will not work if the other person's place is Copy-Locked.
- Run ROBLOX Studio. Browse to the place page. Click Edit.
- Once inside you can do one of several things.
- Choose File Menu > Save As, and save the world to your computer and under the name you want. You can then edit the place to your liking.
- Choose Publish to ROBLOX and put it in one of your place slots. You can add more slots on your My ROBLOX page if you are in Builder's Club.