from your last mail I think we have a VERY BIG misunderstanding here!
1. You can NOT make a copy of the stack that has been turned into a standalone!
2. We are talking about separate files.
3. We are talking about the so called "splash" screen technique.
4. Yes -> put url("binfile:...) into url ("binfile:...) will make a copy of a file.
Example:
You have a stack MYSTACK that you want to make a standalone from but also want to make that stack editable.
Then you do NOT create a standalone from that stack but rather create an extra stack e.g. "splash", which will only be turned into the standalone and open stack MYSTACK.
Now create a standalone from stack "splash" and add the stack MYSTACK to the standalone via the "Copy files" tab as explained earlier. THEN you can use my script to copy stack "MYSTACK to the users docs folder if neccessary, because we have your stack as a separate file in the app bundle and can be copied to the users doc folder.
Capisce?

Best
Klaus