You can get a Component to Composite converter ( several of them come with the component cables necessary ) and use component out of the receiver, then go to the modulator that you already have.
This lets the TV be outputting all HD signals.
http://www.amazon.com/Component-Com...8-2&keywords=component+to+composite+converter
This lets the TV be outputting all HD signals.
http://www.amazon.com/Component-Com...8-2&keywords=component+to+composite+converter