Need to know what kind of impact installing a Line of Business (LoB) application has on a server?
Run the Attack Surface Analyzer prior to installing that application to get a baseline.
After installing that LoB run the Analyzer again and compare against the baseline.
In some cases, be prepared to be surprised at the changes the LoB install made.
This is definitely one to keep on the Technician's Thumb Drive (blog category).
Microsoft Small Business Specialists
Co-Author: SBS 2008 Blueprint Book