ccysm, these files seem to be part of a Squeak application, that may not be related to Scratch at all. Its probably best to ask the person you've gotten theses files from what to do with them.
If you've downloaded the Scratch source code from this site, please read the instructions on the download page how to setup the squeak environment to run the Scratch source code:
http://scratch.mit.edu/pages/source
In short:
You'll need 4 files:
- a "VM": Best to use a copy of the Scratch.exe (or .app on a Mac)
- an .image file
- a .sources file (http://scratch.mit.edu/files/source-code/SqueakV2.sources)
- a .changes file
Put all of these into the same directory and double click on the Scratch.exe/app to launch the Squeak IDE on Scratch.
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