A lot more detailed, and includes several mods I didn't bother with.

My own card?
It came with a larger rom.
I flashed it with the original Apple rom, taped over pins 3 and 11 (so I could later remove the tape if I wanted to install the card in a G5) and popped it in my FW800 with my LCD monitor hooked to the VA output.

viola!

Your guide makes it looked more complicated then it actually is.
Even if you've only got a 64k rom, you just substitute a reduced rom for the original rom and do the same.