I rather glibly told some friends of mine that what they needed, in order to play music and videos from their Windows PC on their TV without lugging anything about or rewiring it, was a wireless Media Center Extender. Now they want to put their money where my mouth is, so to speak, but the thing is I don't know that much about the Windows home-networking ecosystem. So I thought I'd ask you lot.

The setup is:

• Windows Vista and Windows XP PCs with the media on
• MP3 audio files, MPEG-2/MPEG-4/H.264 standard-def video files
• Wireless network
• Standard-def, 4:3 NTSC TV with S-Video and composite inputs only
• AV Receiver and 2.1 speaker system, plenty of spare analogue audio inputs

Is it, in fact, a Media Center Extender that I need, in order to solve that problem? (The Vista PC, at least, has Media Center installed.) If so, I'd be interested in recommendations, especially for ones that can be found on Amazon USA.

Many thanks,
Peter