To perform operations and routines on virtual CDs, the program must be able to identify the virtual CDs unambiguously, by some unique characteristic. The Virtual CD system identifies virtual CDs by their full name; in other words, by the file name of the virtual CD and its entire path (drive designation and folder names). CDs can be registered on the NMS Configuration page of the NMS Settings, under Registered virtual CDs. Virtual CDs are registered by naming them in virtual CD configuration files (called VCDImg.dat). You can specify one or more configuration files in this dialog to register them in your NMS system. Configuration files are stored in the global configuration path specified for this purpose in the Settings, on the Network page (Virtual CD v9 and earlier) or the Configuration page (Virtual CD v10). (For details on configuring the clients, see "Configuring Virtual CD clients in this manual.)

These configuration files list the virtual CDs that are registered in your Virtual CD system and are available globally (e.g., over the network). Any time you add or remove virtual CDs the corresponding DAT file is changed accordingly, which means changes are automatically reflected in the Virtual CD NMS system. Virtual CDs must be registered (i.e., published in the specified global configuration file) before Virtual CD NMS can insert them. The same prerequisite applies for the assignment of licenses and identification of usage data.