I had some doubt but finally got the courage to do the work unsupervised. It's was a little intimidating at first but once I got it going it didn't seem to be so bad. I believe most of the advice has been given by G-AMG, ohlord and gregs210, I just want to add a little bit more from non-mechanic perspective for the new diyers, here's my tip:
1. Get all your tools together: 27mm torx bit, ohlord's plug removal tool, 5/8 plug sockets (one with rubber insert and one without), 1/4" and 3/8" ratchets, 3", 4" extensions(for 3/8" ratchet), a Lislie tool and plugs.
2. Lift engine cover and work on passenger side first, remove air box, MAF to free up some room. Use the torx bit to remove coil packs (I'd say label them 1,2,3 with 1 being close to the firewall). Simple rule for plug wires: bottom one always on plug closer to the firewall.
3. Use the tool to remove plug wires, from the front to back. The first 5 wires were easy. The last one, I have to maneuver and can only get it out from top.
4. Use the 3/8" ratchet, 5/8" socket with rubber insert and 3" or 4" extension to remove plugs from front to back. Put a new plug in for each removed plug immediately to avoid dirt/oil to get into the hole. Gently screw them in but DON'T tighten them yet . After all 6 plugs are done, use the 5/8" socket without rubber insert to tighten them (or torque to 28 Nm). I use the non-rubber insert to tighten so I can pull out the socket.
5. Put back the plug wires, from back to front. Each time use the 17"mm tool to snap them back on. I can only hear them click by using both hands pushing down - and it's the reason I suggest working on the passenger side first to have more room to work with and to have a feel for it. For each set (2 wires) reinstall the coil pack.
6. Now for the driver side, it's quite a bit tighter but it's the same procedure from 2-5. It's just more difficult to snap the plug wires onto the plugs tightly. A Lislie to maybe helpful with the twist and push motion (as suggested also by gregs210)
7. Reinstall the air box and MAF and you're done. :thumbsup:
Overall it took me total 4 hours but two separated days since I got rain on the first afternoon (darn Florida weather, it was beautiful when I started it)

. My plugs were still very good for being 10 years old and 85000 miles on them, to me seems like they can go for another 50000 miles without any problem. Afterward, the car didn't seem to sound and drive any differently as it was always smooth before. I'll check to see if I can get better mileage currently at 24.5 for 50/50 driving.
A strange thing was that two of the plugs on the passenger side actually have oil all over their thread
while the rest were clean. Any comment? Should I be concern?
1. Get all your tools together: 27mm torx bit, ohlord's plug removal tool, 5/8 plug sockets (one with rubber insert and one without), 1/4" and 3/8" ratchets, 3", 4" extensions(for 3/8" ratchet), a Lislie tool and plugs.
2. Lift engine cover and work on passenger side first, remove air box, MAF to free up some room. Use the torx bit to remove coil packs (I'd say label them 1,2,3 with 1 being close to the firewall). Simple rule for plug wires: bottom one always on plug closer to the firewall.
3. Use the tool to remove plug wires, from the front to back. The first 5 wires were easy. The last one, I have to maneuver and can only get it out from top.
4. Use the 3/8" ratchet, 5/8" socket with rubber insert and 3" or 4" extension to remove plugs from front to back. Put a new plug in for each removed plug immediately to avoid dirt/oil to get into the hole. Gently screw them in but DON'T tighten them yet . After all 6 plugs are done, use the 5/8" socket without rubber insert to tighten them (or torque to 28 Nm). I use the non-rubber insert to tighten so I can pull out the socket.
5. Put back the plug wires, from back to front. Each time use the 17"mm tool to snap them back on. I can only hear them click by using both hands pushing down - and it's the reason I suggest working on the passenger side first to have more room to work with and to have a feel for it. For each set (2 wires) reinstall the coil pack.
6. Now for the driver side, it's quite a bit tighter but it's the same procedure from 2-5. It's just more difficult to snap the plug wires onto the plugs tightly. A Lislie to maybe helpful with the twist and push motion (as suggested also by gregs210)
7. Reinstall the air box and MAF and you're done. :thumbsup:
Overall it took me total 4 hours but two separated days since I got rain on the first afternoon (darn Florida weather, it was beautiful when I started it)
A strange thing was that two of the plugs on the passenger side actually have oil all over their thread