Run Internet Explorer 7 standalone (without touching existing IE6 install).
Works like a charm! Read the details here; http://tredosoft.com/IE7_standalone
C:\\Program Files\\Internet Explorer 7>IE7-WindowsXP-x86-enu.exe /x
C:\\Program Files\\Internet Explorer 7>
C:\\Program Files\\Internet Explorer 7>update\\xmllitesetup.exe
Multiple IE installs (> v3)
Didn’t yet try the installer option below:
http://tredosoft.com/Multiple_IE

I would like to try the installer