Help Setting up MS SteadyState to Keep my Vipre Definitions Current

I am using Microsoft Steadystate on a machine and wish to keep the definition files up-to-date each day. When the computer restarts I have it set to not save any changes. I can set the computer to grab Windows updates and also to have a custom script to have SteadyState download/update the definition files for Vipre and save those changes. Can anyone tell me what file I need to point to? Any assistance will be greatly appreciated :)