Running MRTG As A Service

I am using Multi Router Traffic Grapher (MRTG) to monitor various devices on our frame relay network. MRTG is running on a NT 4.0 server. Is there a way to make MRTG run as a service so that it will continue to function while no one is loged into the server?

MRTG WebSite
http://ee-staff.ethz.ch/~oetiker/webtools/mrtg/mrtg.html