Dear deXter, I think no one has understood my query clearly. I really mean that can I degrade some programs from Win XP SP2 to SP1 without uninstalling SP2.(as you know in sp2, Windows Movie Maker is upgraded and it is not easy to operate by beginners{not me}.So can I degrade this to the version present in sp1 without uninstalling SP2?)
Thank you for your earlier reply.