How do I replace MSOINTL.dll in Office 2007 Beta

[LorenzaM]

I downloaded the Office 2007 Beta in Septermber or October and worked in Word
and Outlook for a while without trouble. However, right after Christmas
whenever I would try to load either of the two programs (or any other for
that matter) I would get the error message: "Microsoft Office requires the
file MSOINTL.DLL to run. Run setup again to ensure proper reinstallation."

The only problem is that I haven't uninstalled any of the software so why am
I getting this message and, absent the original downloaded setup file (which
I deleted after installing Office 2007) how do I get this Dynamic Link
Library for reinstallation?

I wrote to Microsoft requesting some help and of course, have received none
to date.

Does anybody have any tips or remedies that they can share with me?

Thanks in advance!