Iain,
Yes it does but you can also have the roster in the WiThrottle server which in this case is the YD7001. The point of having WiThrottle in the YD7001 is that you don¡¯t need an interface to JMRI.
WiFiTrax which makes an NCE interface and also WiFi interfaces for locos, incorporates the roster within the WiFiTrax modules. Including the function descriptions. WiFiTrax includes the ability to load the roster from a JMRI xml loco export.
It is a nice to have feature.
Cheers Brian