Wild Riders is VGA. I would know, cause ours has a D9200 in it for that very reason.
NAOMI/NAOMI 2 games either run in standard res or high res, no medium. I went through the trouble of installing a U5000 jumpered for 24k in my Zombie Revenge only to read in the manual that none of these support that.
so you either go tri-sync or you look for a U3000/3100.
or don't quote me, I'm honestly not finding anything in the WR manual about a standard res setting. I could try it myself, the 9200 should pick it up.