I do have some questions regarding overall graphics since I can't see for myself right now (youtube isn't accessible at my work). First: Texture alignment, this has always been at best a tolerable thing for me to ignore, but does annoy me every once in a while. Is that part more accurate than other emulators?
MooglyGuy's (+MAME team) software render is pretty much pixel for pixel with the actual console, so yes.
Looking good there! Though a bit dark at times.
It is certainly dark, and are some things (health bars) that don't render in game. There is definitely a buggered instruction somewhere.
"pifrom" is the BIOS dump. Cart is the game ROM. I believe you have to point to both of those in the command line. Obviously, you'll have to get both of those yourself.
Still, even after trying this, it would not load for me.
You need to pass the location to both the PIF ROM image and a ROM (cart) image. There is no help menu, no UI, etc. or anything. The ROM must be in native, big endian byteorder (z64); it won't byteswap for you. MAME/MESS also requires this image in order to boot their emulator.
To be clear, launch like so:
cen64.exe pifrom.bin starfox.z64
assuming those files are in the same directory as cen64.exe
What is the error that you get?