Feb 19, 2010 12:15 PM|drhender|LINK
Using a n MSI Viewer that I found via Bing, I was able to find the public properties that are exposed by the MSI created by the web setup project. Only two of the three properties I was looking for appear to be exposed: TARGETSITE and TARGETAPPPOOL.
So to drive this from the command line...
msiexec.exe /i MyWebProject.msi /q TARGETAPPPOOL="My App Pool" TARGETSITE="My App Site"
Hope others find the info useful.