I've had all sorts of, minor, problems with FCEUltra. I highly suggest VirtuaNES.
Joseph Elwell.
Hey that seems to be way better! however withing the emulator im getting an error message on various roms.. ":Because a NES Header is illegal, there can be the thing that cannot work normally, do execute?" ? can i bypass this error ?? its annoying just on some games will it do this
I might start a new thread about this but hopefully someone can fix it here first
This is a "feature". From the wiki, which I wrote

:
"VirtuaNES is stricter with ROM (headers) checking than FCE Ultra which means instead of bizarre behavior, VirtuaNES will not allow bad ROMS to be used."
Most Emulators don't complain, because the headers aren't needed for emulation. HOWEVER, they can be sign that the entire rom is corrupted if your header is bad.
I suggest getting clrmamepro and/or goodtools and checking your roms. On the bright side, you're likely to have a whole lot fewer problems, but until you get good roms you'll see a few of these messages.
The source for VirtuaNES is available, so if you can't get all your roms perfect you could comment out that warning if you just don't want to see it anymore. There might be a flag you can pass but I didn't notice one and I've only ever gotten this message once.
Joseph Elwell.