I have created a one-liner vanilla hello-world C# Outlook add-in using
VS2008 and published it using default settings. Copied everything in
\Publish folder to CD and installed on several machines (none with
VS2008).

In all cases, the setup downloads .Net 3.5 and Visual Studio Tools
runtime. I also manually install the Office 2007 PIA (why aren't
these available in the prerequisites???) manually.

In all cases (both XP and Vista boxes running Ol2007), Outlook starts
up and disables my add-in. Under tools/trust center/Add-ins/COM add-
ins it is unchecked with an error "Not loaded. A runtime error
ocurred during the loading of the COM add-in."

I have been doing research for a couple days now - but most
information seems to be related to establishing trust when using
VS2005/MSI. Not much on VS2008/ClickOnce.

So:

What else do I have to do (apparently undocumented) to get this to
work?
And why are the PIAs (and any other manual steps) not included in the
automatic prereq-checking?

Thanks for any help!