I am in the process of creating a new version of our standard XP Ghost image, this is mainly to update it to SP3 and also to include all subsequent patches. I have noticed however that the image has grown by about 40% and would like to trim it as far as possible.
The Windows Installer cache (C:\Windows\Installer) contains over 100Mb of .msi and .msp files. As this is a clean, base image with no applications installed, is it safe to clean up some/all of the contents of this directory? I have found references to MSIZAP (http://support.microsoft.com/default.aspx?scid=kb;en-us;290301) which imply that it can be done. Is this is good idea? If so, which parameters should I use?