I have done this myself it was fairly easy it took about 6 hours, but I was in no way hurrying.

1. Remove the air filter elements. (Use a flat head screwdriver)
2. Remove the plenum. (You will need a 10mm and 13mm socket, and a pair of vice grips.)
3. Remove the 4 bolts holding down the fuel rail, remove the thin metal rail running along the top of the fuel line. Pull up and the injectors should simply pop out.
4. Remove all electrical connectors on the harness for the fuel rail, (3 by the ECM, Cam Position Sensor, The sensor behind plenum, and coolant temperature sensor) and then swing the riggins out of the way.
5. Grab a 10mm socket with a 6 inch extension and a universal socket joint. undo all the bolts holding down the lower manifold. (COOLANT WILL PISS OUT EVERYWHERE) You will need to use the universal joint to get the bolt on the bottom rear head near the power steering pump, you will see why.
6. Undo the heater pipe rubber hose by the brake fluid resevoir and the upper rad hose. Remove lower intake manifold.
7. Cover up intake ports with paper towels, jam them in there.
8. Grab some heavy duty engine degreaser or brake cleaner and spray the hell out of the entire valley (might as well clean the whole thing) and scrub with a tooth brush.
9. Grab compressed air (if available) or buy a little can of compressed air and spray the piss out of the valley starting from the belt and working towards the tranny. Then spary the snot out of the oil plug area.
10. Grind the top of the plug down with a dremel in a v notch fashion. Clean with compressed air.
11. Undo the 13mm retaining bolt. Remove C-Clamp.
12. Use needle nose pliers to pull up on the plug.
13. Use teflon tape its kinda orangish pinkish. You need to spin about a foot of this stuff between your fingers then double it up and spin it together again so that it makes a thin rope. Get a partner to hold the plug up with the pliers and wrap the tape around the underside of the plug TWO times overlapping each other, very important that you do it twice.
14. Push the plug down and finger tighten bolt. Wait five minutes and torque down to spec.
15. Reassemble the reverse of tear down.

Instead of cutting the brown o-ring the teflon tape allows you have a complete seal. No RTV sealant is required.