Ok, so i bought a new desktop computer today.
It's all good....apart from i can't find any way to add my MAC (or physical address)
to a designated area.

I have a D-Link DSL-G604T wireless router.
I don't think that my desktop is wireless enabled, so just on te safe side,
we have hardwired my desktop to the back of the D-Link router. (In port 1)

However nothing has happened so far.
My cousin gave us some basic instructions as to add the MAC address first which would in turn give us an IP address.

So, any help given would be greatly appreciated.
Thank you.