Q: Restore playlist after Carbonite restore XP to Win7?

Playlists are stored in the iTunesLibrary.itl file.

Restore the ENTIRE iTunes folder from your backup.

Do not import anything, there is nothing to import.

Open, iTunes, everything will magically be as it was on the old computer.

Where are my iTunes files located?

Close iTunes.

Place the iTunes folder in the location listed in the link above.

Hold SHIFT and launch iTunes.  When prompted to select or create a new library, point iTunes to the correct new location, it should default there but just to be on the safe side.

Now the playlists, playcounts, and other iTunes data should be exactly as it was on the old computer.