Unless someone has already done this one (nothing in the Deployment Tips section here) your best bet will be to speak to the vendor about silent mass deployment.

By the sound of it it's not going to be as simple as a '/s' approach.

Once you have the info you could create a Deployment Tip other users of this site.

Dunnpy

Sage apps should be Installshield developed, you should be able to create response transform which installs and uninstalls silently. 

i am also facing the same problm. i cant find silent switch for installation of office line evolution 2012. 

can you please tell me , how you finally packaged this application.?? 

also suggest, can Response file be created for an application setup.exe which requires reboot in the middle of the installation.

your help will be highly appreciated.