Since URC never made any effort to fix USB emulation port on the back of the MSC-400, I found another solution.

Ingredients:
Aaxeon STE-501C + PA-STX-US ([Link: aaxeon.com])
Media Center TCP/IP Controller

Recipe:
Download Media Center TCP/IP Controller from http://vmccontroller.codeplex.com and install on your Windows MCE computer.
Now your MCE is listening for control commands on TCP port 40500
Connect STE-501C to RS232 port of MSC-400 via URC RS232 cable.
Connect STE-501C to any avalable port of your router/switch via CAT5.
Apply power.

Here is a list of the commands you can send to your MCE
[Link: vmccontroller.codeplex.com]

I will post a CCP file if anyone is interested.