How is this relevant? Haha. Its an informative post. You're right, I did not in fact provide a solution, just some information on the subject since I have been toiling over this issue myself. Slipstreaming used to work (Beta1) and I have a feeling that it will work in the near future. You've been able to slipstream every other IE install, and I'm sure this one will eventually be the same way. Good luck "putting in a ticket" to MS to make their installer work in a post install script though (which will probably be ignored)