Just as a side note, even if the jackpot requires the quads and pocket pair to be the same rank (which seems very likely to be the case), the "other" case where a player wins the hand with a pocket pair and a different rank quads are on board is sort of interesting to me.
I coded up a simulation of this case and let it run over night. The simulation pre-supposes quads of a specific rank on board and tallies how often the hand is won (or split) by a player having a different pocket pair.
9,613,082 deals out of 100,000,000 are won this way. Of course, that is approx 9.61%.
I don't know how easy or difficult it would be to derive this probability analytically. If anybody is looking for something to do, they may want to try to tackle this problem.