First of all, eveeryone is telling you correct info. You can not have XP themes on anything other then Windows XP. If you want you can manually draw them to look similar using GDI+ but its allot of work. Themes in XP are not necessarily a function or control but a drawing process that occurs before a window is rendered. This is just like manually drawing the graphics yourself. so if you want similar "themes" in 2000 then I suggest you read up on GDI+.