shit, i guess my car is waaaay different, but I am surprised that you would have to cut anything with a blade.
The following is almost word for word from the factory service manual for a 92 Civic, so keep that in mind. It may help, but if something looks different, just stop and go get an Accord manual.
Disconnect the negative terminal on battery first.
Remove fuel filler cap.
There are two bolts on top of the fuel filter assembly. The smaller one is the service bolt, and it is for relieving fuel system pressure. The larger one is the banjo bolt (it's OK if you don't know what a banjo bolt is, I would explain it, but I'm tired).
Put a towel over the whole thing, hold the banjo bolt in place with a box end wrench (12mm), and then loosen the service bolt (6mm) very slowly (slowly because the fuel is pressurized and will spray) one turn.
Then remove the banjo bolt and fuel feed pipe from the filter.
Remove the fuel filter clamp and fuel filter.
Get new washers, and put it all back together!
You should probably get a fuel pressure gague and check the pressure before you are completely satisfied, but if not, at least you have clean fuel!