That is a good question. I had a guy from the store where I bought it do the install. So this much I know - when I watch a DVD I have to select HDMI 1. So I thought that to use the OSD function, it would come on the same 'channel' HDMI 1. But that is not the case. I will try to get behind and look at the cables to see how he put the video from the amp to the TV. The TV is a Phillips Plasma 42" flat panel that is mounted on the wall, so my best chance to see the connections is at the back of the amp. In any case, I appreciate any and all help on the matter.
That receiver doesn't have HDMI, so the video is obviously not going thru it.
Chances are, if some one else installed it, there is no connection from the receiver to the TV at all. (yes OSD means "On the tv Screen Display)
In your case it's probably best to leave that portion of it alone, as the HDMI will give the best picture.
If you need to see the OSD thru the television, which is not an absolute necessity, The best way would be to simply connect analog (Red White and Yellow) from the receiver to the TV.
You will not be able to see the OSD overlaid on the screen while watching a DVD, but you will be able to see better whats going on during any manual set-ups.
In reality, even the newer receiver don't lend themselves well to OSD thru HDMI anyway. So don't feel too left out.