Home audio & video: Component Video and RCA

Component Video and RCA

First, apologize for the ignorance, but:

I just bought the Westinghouse LTV-32w1 Widescreen LCD and Best Buy had a promo for a free Insignia IS-HTIB102 DVD 6.1 surround system.

1. I tried the Matrix DVD right away, along with some others, but I still saw black bars about an inch above and below, even though I set the dvd player and tv to 16:9. I thought the whole purpose of a dvd with a so called widescreen tv means the movie fills close to perfectly?

2. I am connected via Monster cable component video, Red/Blue/Green. The dvd has 6 speaker connections. Do I also use the RCA red/white/yellow cable to audio and video IN on the TV? if so, why, cause isn't it then redundant?

3. Insginia speakers are all humming very lowly, and I can't figure out why. It also says to keep the system 3 meters away from other transformers or even TV's, but I doubt it is the tv or doubt they want me to have the dvd player 9 feet away?

Much appreciated.