No it won't do HD or 16:9 over composite or S-Vid Cables.
My recomendation is use the HDMI if the TV has one. If not. Then I would recomend getting a Component Switch box. They can easily be had for as little as $39 for manual switching of 2 Components to 1 output. to as much as $100 for a remote controlled 4 in 1 out switch.
Check with Best Buy, Fry's, CC, and a few of your higher end Home theater stores. Or online as well.
OR.....
Put the TiVo HD on component and put the WII on S-Video or Composite as the WII does NOT put out true HD content where as your TiVo HD does put out TRUE HD as well as your Xbox 360. It puts out true HD content as well. The wii isn't true HD.
TGC
My recomendation is use the HDMI if the TV has one. If not. Then I would recomend getting a Component Switch box. They can easily be had for as little as $39 for manual switching of 2 Components to 1 output. to as much as $100 for a remote controlled 4 in 1 out switch.
Check with Best Buy, Fry's, CC, and a few of your higher end Home theater stores. Or online as well.
OR.....
Put the TiVo HD on component and put the WII on S-Video or Composite as the WII does NOT put out true HD content where as your TiVo HD does put out TRUE HD as well as your Xbox 360. It puts out true HD content as well. The wii isn't true HD.
TGC