you can get the monthly codes loads of ways here is some examples:
1.the easy way --- through the net
2.you can read your card and get them
(you need an au card for this)
3.you can use a season interface (this is what i use) a season interface connects to your digital box and to your pc and with the correct software it will read all the c codes sent to your card.
to read your card you must have an AU card as the key gets updated each month.
to be honest if you just have a gold card and no programmer it is impossable (i think) you will just have to wait for it to be uploaded.
which is normally when the cards switch off
hope this helps you out on your quest lol