iTunes Script - Add Wishlist Item. Note that this information is probably out of date. It is being added here for reference/archival purposes and relates to a blog post from 2005

gistfile1.scpt

-- This script uses a dummy mp3 file (not supplied) to add a wishlist item to a specified playlist in your library. 
-- Useful for when the track isn't available from the iTMS (and hence you can't drag this in as a wishlist item) and you want to remember to acquire it later from 'other sources'. You can use the dummy track in a playlist to act as a placeholder until you obtain it. I.e. to layout a running order, etc.
--
-- HOW TO USE
--
-- Use Quicktime to create a dummy mp3 file. Open a new player and just save as to create a mp3. 
--Place the dummy file somewhere suitable, amend the path below
--Amend the wishlist playlist name if so desired
--This script (last time I checked) worked better when complied as an application, otherwise some Apple Event time out errors occur with the dialogs sometimes
--The script will prompt for a name, artist and album when run.

tell application "iTunes"
	activate
	try
		set win to front browser window
		tell win
			display dialog "Add placeholder file" & return & return & ¬
				"Track Title:" default answer ""
			set track_title to the text returned of the result
			display dialog ¬
				"Artist:" default answer ""
			set track_artist to the text returned of the result
			display dialog ¬
				"Album:" default answer ""
			set track_album to the text returned of the result
			-- add dummy track, change location to suit
			add "Powerbook HD:Users:you:Music:temp.mp3"
		end tell
		--change wishlist to whatever your wishlist playlist is calledr
		duplicate track "temp.mp3" of playlist "Library" to playlist "Wishlist"
		set this_track to track "temp.mp3" of playlist "Wishlist"
		set the name of this_track to the track_title
		set the artist of this_track to the track_artist
		set the album of this_track to the track_album
		set enabled of this_track to false
	end try
end tell