Hello -
First of all it isn't a matter of "offending" so much as it is 2 other
considerations
Posting the same message multiple times makes it more
difficult for the poster, himself, to track replies as well as making it
more difficult for anyone else to follow the discussion. Secondly, those who
participate here do so on a voluntary basis contributing their time to
assist other users. It is a waste of that time to spend it answering a post
only to find that it has already been addressed elsewhere - time that could
better have been spent helping someone else.
As to your current situation, I'd suggest you follow Diane's recommendation
in the other thread to re-apply the 10.4.11 *Combo* Update for OS X, run the
repair disk permissions routine from Disk Utility, restart your Mac then try
installing 2008 again.
If you continue to have a problem come back with the details. I don't know
if the edition supplied through that program differs from the retail Upgrade
or not, but as I replied before the message you saw indicates that the
Installer isn't being recognized as a program but is instead being treated
as a file. Since there is no application associated with a "file" of that
type [because there is no file of that type] the error is being generated by
the OS. That's typically an indication of a permissions issue.
HTH |:>)
Bob Jones
[MVP] Office:Mac