How do I create Windows XP Themes?

Tengu

惣流・アスカ・ラングレー
#1
Ive searched the internet as well as the microsoft website hoping to find some way of creating my own Windows XP Themes, Ive used seach engines such as Google and have found no information on how to create Windows XP Themes. Can anyone tell me how I could create one or link me to some form of a tutorial please?
 

Tengu

惣流・アスカ・ラングレー
#3