I have found a post indicating one can use /S to install Defraggler silently. Are there switches to opt out of the Yahoo tool bar? Are there other switches?
Also, is there a way to have the installer put the Start Menu shortcuts under All Users rather than the logged in user?
for sans Yahoo bar use the slim build http://www.piriform.com/defraggler/builds
Also, it's best to edit your posts instead of double posting when you've not yet received an answer (General Internet Forum etiquette)