Just tried xmen vs sf and vampire saviour on my hi saturn using the official 4 meg card, but had bad luck. With xvssf, it loads and shows the demo playing fine, but if I press start I get a black screen. With vamp sav, I get the as far as the capcom logo and then a blank screen. And if the cart is not plugged in, both games tell me the message that I need to plug in the cart. Is the hi saturn incompatible with the 4meg cart or something? The cart and games seem to work fine on my white saturn.