iis on xp??

IIS is a built in component of 2003, XP, 2000 and is NOT downloadable or upgradable without upgrading to a new OS.  2000 uses IIS 5.0, XP is IIS 5.1, and 2003 is IIS 6.  


to install iis need cd os  for xp  or for 2wk 
remove/install----add or remove new compnt select iis