i using window xp sp2 and i wish to create a hidden partition to easy me for reinstall the window. because with the hidden partition i just need to click the button recovery back and did not need me using the cd to format and install. so could some of the members tell me how to do that? thank.

Acronis TrueImage, from www.acronis.com does exactly what you want. I've used it many times. Works excellently!