|Complete MSI not Cached|
There should be an attribute which tells Windows Installer to cache the complete MSI (not remove files) so as to remove the need to reenter original media. To keep it simple this could be limited to files imbedded in the MSI (or perhaps some new table needed to flag what external files get cached).
Note that apparently as a workaround to "Unidentified Publisher” messages under Visa (for signed installers), under Windows Installer 5.0+ the files are no longer stripped. This does not however solve the problem as the non-stripped files are never used![5.0+]