I recently finished repairing my actuators as per the post "Power door locks fixed!" you're referring to. I had 3 of my actuators not working anymore, and after following the procedure listed in that post, they are all working like new again.
Don't let rutwad scare you, either.

The worst part of the whole job is removing the actuators in the first place, which you have to do even if you find replacements from ebay, or anywhwere else. After you have the first one behind you, the rest won't be so bad.
I would recommend that you plan on taking the better part of a day, and rebuild all 4 of your actuators, (if you have a crew cab) and just get it over with while you're set up, and everything's fresh in your head. You can complete 1 door at a time, and once you get rolling, the rest will go smoother. I would also recommend having truck parked somewhere warm, and out of the elements. Removal and replacement of actuators will be much more pleasant with warm hands.
Your main reference link for replacement doesn't look bad, but since I've recently finished mine, let me see if I can add some input to that procedure.
TOOLS NEEDED: #27 Torx driver, 9/32" socket, or nut driver, large flat screwdriver, small flat screwdriver, Locktite, (blue), 1 tube silicone caulk, or clear adhesive caulk, masking tape, small flashlight, old-school drum brake adjustment spoon, or check glove box for small metal spoon looking device with a hook on the end of the handle. This tool looks like it was made for un-clipping the green and white retainer that connects to the outer door handle. Unfortunately, I didn't find mine until I was all done.

I'm not sure if it was there from the factory, or was left there from a previous repair from a shop, but worth checking for. Last, but not least, you'll need a six pack of your favorite beverage.
STEP 1: for front doors, using your hands, remove the pillar cover from door by pulling it straight away from the door. start at top, then work the bottom. Then, using your hands, pry the power window / door lock panel up, starting from the front. use a small flat screwdriver to un-clip wiring harness from rocker switches, and place switch panel in a safe place. Then, use a small flat screwdriver to gently pry off door light / reflector lens, and put it in a safe place.
STEP 2: using a 9/32" socket (7mm?), or nut driver, remove the 2 trim bolts from under the switch panel, and behind the lens. Pull up on door panel, and then a couple of inches away from the door. Twist, and remove the door light from a front door panel, and place door panel out of the way. Then, peel back the plastic cover from the latch side, to about 1/3 the way towards hinges, and tape up out of the way.
STEP 3: ON FRONT DOORS ONLY: remove door key actuator rod from upper mount, using large screwdriver to push apart retainer. Pay attention to the orientation of this rod for putting back together.
STEP 4: push yellow plastic door lock button retainer that holds door lock button rod through door, then un-clip yellow plastic retainer from actuator end of rod, and remove rod from door latch assembly.
STEP 5: push white plasic inner door handle cable retainer through door.
STEP 6: (the worst part of the whole job.) Use either the tool from your glovebox, (if you're lucky enough to have one,) or I used the brake adjustment spoon, to un-clip the green and white retainer from the outer door handle rod. Use a light to spot the tiny little tab that you have to hook something on to, and pull it straight toward the hinges to unclip the retainer from the rod.
STEP 7: remove the 3 door latch screws with a #27 torx driver.
STEP 8: fiddle the lock mechanism with actuator down and twist 90 degrees to roll around window track, and work it out of the large door cavity. Un-plug the actuator, and use a small screwdriver to pry the retainer on the inside of the actuator where it slides sideways onto the lock mechanism. Pull actuator at the same time to remove it.
STEP 9: installs in reverse order with new actuator. Skip the first part of step 1, and all of step 3 for rear doors. Use locktite on screws, and caulk to glue plastic cover back to door. I also took the time to clean everything really well while it was apart, and lubed the lock mechanism and hinges with white lithium grease.