RGBHV is "analog" and DVI is digital, so no cable will connect the two... I suspect a box converter is going to be expensive. The HV refer to separate horizontal and vertical sync cables. I think normal "component" is sync on green or something like that... You might try seeing what happens just using RGB->RGB and leaving the HV open; the plasma may be smart enuf to find the sync. You might also try the plasma forum at http://www.avsforum.com. Those guys do video like A'gon does audio... obsessively.