1st Disconnect the Water in Fuel Sensor, It's the plug coming off of the the bottom of the filter.
2nd, Drain the fuel out of the filter can by pushing up on the "Plunger" on the WIF on the bottom of the filter.
3rd, Place a plastic bag over the filter can to catch any spillage (Very Optional

)
4th, Loosen filter can be twisting it off the fliter mount (Righty Tighty; Lefty Loosey

)
5th, Remove the WIF sensor from the old filter can, and install on the new filter, using engine oil to lube the O-ring. The O-ring should come with the new filter.
6th, Screw the new filter on to the filter mount. tighten it to 1/2 to 1 turn after it touches the filter base. ( there should be the exact amount on the filter can.
7th Prime the filter by stroking your lever on the lift pump. You may need to push in the plunger on the WIF sensor.
8, Fire the CTD up! It may sputter or take a try or 2.
9, Check for leaks.
Moose, a former 1st gen guy (KIA 2002 :{ [the Truck that is])