System Preferences on AppleTV

Does anyone know how to get the regular system Preferences on the AppleTV?

What i mean is if use nitroTV applications then select Apple>System preferences you get a system Preferences dialog with only one selection.

What would you need to modify on the AppleTV toget the regular system Preferences on the AppleTV?

I am asking this because i want to use the AppleTV as a SIP Box and need the ability to choose where my audio comes from.

I am able to dial out with Express Talk VoIP Softphone but i’m not able to choose my audio source.

Express Talk VoIP Softphone
http://www.nch.com.au/talk/index.html

Thank you.