I wonder how difficult it would be to just take a packet capture of such a client booting up and connecting and then building a server from scratch - something

I wonder how difficult it would be to just take a packet capture of such a client booting up and connecting and then building a server from scratch - something that would convert between the Sun Ray protocol and bog-standard VNC. This would save a lot of the setup process and allow these clients to be used plug and play by just running a single server binary.