http://www.nintendo.com/consumer/systems/wii/en_na/setupComponentindex.jsp
That’s a link to it on Nintendo’s site.
Your tv has to have the connections, then you make the switch under the settings menu for your wii.
I don’t understand the difference between 480i and 480p, but I did order the cables. I played Mario Galaxy for four days with the cables that come with the system; the new cables arrived today.
I noticed a big difference. The 480p is MUCH clearer and sharper…the colors are a bit more vibrant. It just make everything crisper and cleaner.
BTW, I have a 52" Samsung LCD.