OK,

Too late at night, too little caffeine:

I was trying to install VS.NET Enterprise Architect 2003, and I entered my
2001 product key.  The installer accepted it, but when I try to run the IDE
for VS.NET 2003:

"Please enter a valid product key to use this product - setup has detected
that the product key is missing or invalid.
You will find this 25-character key on your Certificate of Authenticity or
on the yellow sticker on the back of the CD case."

I have the product keys for both, but I cannot figure out how to enter the
2003 key.  When I click "OK" on the dialog box, the "preparing to install"
appears briefly, and then is gone.  When I run the installer again manually,
it doesn't give me a chance to enter the Product Key again, as it thinks it
already has a valid one.

Can someone clue me in on how to:
1)  Force the installer to ask for the product key again?
2)  Remove the current key (presumably from the registry) to force the
installer to ask again?
3)  Is there a command line switch for the installer to accomplish this?

Any help would be greatly appreciated.