Published at LXer:

Do you want to try Windows 7 but don't want to shell out the upgrade price? Or do you long to give Mac OS X a test run but don't particularly want to buy a Mac? There's a way to do that (although the OS vendors won't love you for it): Use a "transformation pack." These software packages go beyond changing the graphical user interface to make it resemble that of a different OS. Most of the technically sophisticated transformation packs will tweak or patch the native operating system's code and add startup applications to more accurately simulate the functionality of another OS.

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