How do I run multiple BC server services?


I would like to run at least two copies of Business Connector on the same machine. I have installed two copies in different folders and can run each separately by manually starting them from the command prompt, but I would like to be able to have each copy run as a service. Does anybody have any idea how this can be achieved?
When I run installSvc.bat for the first copy it creates a service that points to the second copy, so there is obviously some commonality between the two. Should I be using installSvc.bat to create the service or some other means (i.e. sc.exe)?