Does the question mean an RGB to component LEAD?
Just to avoid any misunderstanding, RGB and component are NOT compatible, though it MAY be possible to connect with the same lead.
Assuming the quesition about using an RGB to component CONVERTOR, the answer will probably be no.
Component and RGB achieve much the same thing, and if you can at least use one or the other, that will probably be very good, but switching may not be worth the trouble. Component is preferred where you want to avoid the component to RGB conversion stage in the DVD player or the RGB input in the display.
The proposed solution would use the DVD component to RGB convertor, then an external RGB to component convertor, and then a further component to RGB convertor in the display. Three stages of degrading and wasteful conversion where only one is needed.
Far better to use a component output from the DVD if there is one. Otherwise leave well alone and enjoy.
Nick