This I have not tried, but it just might work?
IF you have IE6 then the repair tool is not Available Have to reload
But I found this tweak (untried) that claims that it will do the same on IE6 , bypass the restriction, and NO reload, it will overwrite the IE program
Copy and paste the Command line on this page into the Run box and tell us if it works?
Instructions here :
http://www.tweaksanlinks.com/tweaks/html/IERPR.html
Says it's ok For Win2000 and XP

Thank bedstor, a friend of mine can use that.

For the record, the command mentioned has been posted several times at Answerpool. If Internet Explorer has not been updated, however, the repair tool will not be functional.

In Windows XP, the default version of Internet Explorer can be reinstalled with the command

rundll32 setupapi,InstallHinfSection DefaultInstall 132 %systemroot%\Inf\ie.inf