While researching something else I came
across this problem. I’ve been wrestling with the Admin Console’s *.MSI creation and
for the most part it works really well.
The next step is to add custom installer actions, registry keys etc. stuff
that exists as part of the MSI install.
Here’s a handy tool from the Windows Installer SDK and a related CHM file
that talks about How to Edit the MSI
How to use the Orca
database editor to edit Windows Installer files
http://www.codeproject.com/dotnet/MSIShortcuts.asp
Enjoy.