Media Center .. Adding Channel Manually

Hi;

I am from Australia,
I have bought new ACER ASPIRE 820 with Windows media center,

i have scanned for DTV channels but after scanning it misses lot of DTV
channels and doesnt display them.
it only shows few of them.

can any body tell me how i can add channels manually, i have read lot of
articles on how to add channel manually the method given on them is following


Settings-> TV-> Guide-> Add Missing Channels -> Add DTV Channel


BUT my media center does not have these options

when i go upto Settings-> TV-> Guide-> the only options i have are as follow


CHANGE CHANNEL ORDER
EDIT CHANNELS
ADD LISTING TO CHANNEL
RESTORE CHANNEL DEFAULT
SET UP GUIDE LISTINGS.

THERE IS NO ADD MISSING CHANNEL OPTION.... SO PLEASE CAN ANYBODY HELP ME HOW
I CAN ADD MISSING CHANNELS TO THE MEDIA CENTER PLEAESE I NEED TO KNOW URGENTLY

Any Help with it please

You might get more responses posting into the Australia Media Center
forum