Test SS3 while not effecting SS2

Is there a way I can install SS3 and test\configure it while keeping SS2 loaded and running? What I have found is that SS3 will upgrade SS2 and not install side by side (not happy with this). I will need considerable amount of time to upgrade from Batch Print to the new Printing Styles among other items. I heard of a EasyMultiInstall.vbs but I don't see that as an option in the latest SS3 version (.459). Are there any options for me?