Vistapack takes the file from the host, backs it up, modifies a sample and puts the modified file back in the system.

This ensures that you are using the latest files so no need for alerts like "Now I am using an old file, what if it's updated by Microsoft? Then I will be open for attack...". Nope, no need to worry. You keep the updated file.

The pack uses ResHacker to change icons, bitmaps and some dialogs, to make it look like the new Microsoft Windows Vista!

It's rather safe in my opinion, but of course there are some risks when you modify system files. This is at your own risk!!!

But no need to worry, if you don't like it, you can uninstall the pack like any other software.

http://www.softpedia.com/get/System/OS- ... pack.shtml