Start > Run > CMD /C Explorer "C:\Documents and Settings\%USERNAME%\Application Data\Microsoft\MSN Messenger"
Open up the folder named after that number you got above, then go into Usertiles
You should see a bunch of .dat files, they are actually PNGs so you can simply rename them to check them.
Spoiler:
the game.
the game.
the game.
the game.
the game.
the game.
the game.
the game.
the game.
the game.
the game.
the game.
the game.
the game.
the game.
the game.
the game.
the game.
the game.
the game.
the game.
the game.
the game.
the game.
the game.
the game.
the game.
the game.
the game.
the game.
the game.
the game.
/ 
