This is the response I got from Gameloft when I inquired if Rayman would work on my X5:
"Hi,
Thanks for your patience. Unfortunately, Rayman does not work on these recent devices which use Windows Media 2003. Unfortunately, Gameloft does not plan to release a new or updated version which supports this OS."
Best regards,
Kris Young
Technical Support
Gameloft Canada
kyoung@gameloft.com