[Diggedy76]

Depends on what version of the games your talking about, I have Marvel vs Cap2 (JAP) and it runs in 60hz from the outset, Crazy Taxi is 60hz by default as well. I don't have the first Marvel vs Cap to tell you whether it's 50 or 60, but I've found the japanese versions of all Capcoms 2d fighters I have (SNK vs Capcom, Street Fighter 3rd Strike, MvsC2) do not switch to 50hz. As I've said in an earlier post, you can tell 50hz by black borders at the top and bottom of the screen.