On one of my winXP HE OEM computers I did not have the Zoom option so i installed the small utility IE5WA.exe and it works great even tho it it says it's for IE5 only.
http://www.microsoft.com/windows/ie/previous/webaccess/ie5wa.asp
Having had two computers, one running XP Home and the other XP Media Center (XP Pro), the XP Home allowed a ZOOM IN on a right click on an image and XP Media does not have that option in its right click menu. Is there any way to get that option?