> SqueakVM-2.4c-sparc-solaris-2.5.1: command not found

Try "chmod +x SqueakVM-2.4c-sparc-solaris-2.5.1".  (I don't promise anything:
I would have expected "Permission denied" instead of "Command not found".  The
latter might imply the binary was corrupted somehow during transfer and looks
like a script of some kind to exec.)