Hey felixml,
There is a way to re-install IE6... There is an inf file that kicks off the process, but I cannot remember which one it was, being I did this a while back and haven't kept the documentation on it... I did receive this help via BetaONE, so I am positive someone has the answer out there for you.
I'll look around to see what I can pull up. Just hang in there!
[EDIT]
Ok, I searched for my old thread and found it:
hxxp://www.betaone.net/index.php?showtopic=21699&hl=
See if any of the info within this thread helps you out.
Good Luck!
-SlickVic78