Depending on what you want to do playground has a way to manage external files with smalltalk scripts.
If you double click in the Page tab in the playground you will be able to rename it. If you rename it to
'customScript' and hit enter a file is created in the folder play-stash from the current image directory.
Then whatever you type in the playground is saved in that file.
If you then open spotter and search for 'customScript'�� you will see the file. Select the file and hit enter��
and then a playground is opened linked again with that file.
Cheers,
Andrei