Wow, surprised no one has answered about this yet....... but, the reason why you're only getting like 20 fps with Ocarina of time/Majora's mask is because those games are hard capped at 20 fps (american version)due to those games actually running at those speeds on the Nintendo 64. Their framerate will also sometimes drop to 14-15 at worst because that's what happened on the n64 and there's NOTHING you can do about it.
i7 Xeon X3440 @ 4.4 ghz w/ hyperthreading
ATI 5870 @ 1000/1300 30% fan speed
Asrock p55 Extreme motherboard
4 gigs of DDR3 Gskills Ripjaws @ 1760mhz 7-7-7-24 timings
Syncmaster 2494 24' inch 1920x1080 monitor
Win 7 64 bit Ultimate
ATI 5870 @ 1000/1300 30% fan speed
Asrock p55 Extreme motherboard
4 gigs of DDR3 Gskills Ripjaws @ 1760mhz 7-7-7-24 timings
Syncmaster 2494 24' inch 1920x1080 monitor
Win 7 64 bit Ultimate