yeah, use software such as wiipeer.
You will need a wireless router and a wireless adapter to have wireless pc to pc connection
To connect to a wireless network. This is an alternative to a corded connection via Ethernet or USB.
the easiest way is with a wireless router so that you can use a wireless laptop or wireless adpated PC anywhere in the house
COD4 Online is fere for PC regardless of your internet connection.
yes
yes
To use a wireless microphone you need the software to upload to your pc and a wifi connection with blue tooth capabilities between the pc receiver and the microphone itself.
use wireless. like bluetooth
Either plug the PSP into your computer, or transfer the file onto your PS3 (if you have one) and use the wireless connection to transfer the file to the PSP.
The ethernet cable should come from a modem or router. The plug for you PC is likely the one that would go to the router or modem from your PC. Just as the PS3 has the ability to be either Wired or WiFi so do some computers and that is why they have a spot for an ethernet cable. The PS3 has Network setting that can be switched to allow you to have a wireless connection or a wired connection, but not to have both. The wired connection provides the best connection for the PS3 because the connection can not be lost as with a WiFi connection. You will also find when running the connection test for the PS3 better speeds for the wired connection.
Many companies sell wireless access points. Apple makes a good one that they call an "Airport," but you can only use it with macs. If you have a PC, try something by Linksys or Belkin.
Well, your computer must have a wireless internet card installed on your PC to get the wireless broadband connection. The newer PCs come with intergreted WIFI, so using that you are able to search for networks on your PC. You also need a router which can be bought at any electronics store to set up and create a network.