Actually, it has a easy way to resolve it by putting wamp on usb stick and also google for some free sync soft to put on usb stick as well; then, if you have some files change in desktop, just use free sync soft to update those files on usb stick, and with wamp on usb stick, you can work on your project(s) on any other desktop/laptop no matter it's xp or vista ;-)
Have fun,
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