That has been an issue that has been confounding me for years and I have not found a good work around. As always these little pearls of wisdom we glean from others really help improve work flow processes. So simple and intuitive but yet so elusive.
Copying a system exe from one OS to another is not advisable.
Also how many people will have XP and Vista/7 readily available to them at the same time?
IF he wants to view the clipboard there are several free apps that will work on his OS...
BUT as I said what use they might be in Sketchup is debatable...