supercharged24,
I pulled my battery cable before changing the CPS. In the past, I'd swapped a number of sensors on a Taurus & DeathStar & had spiked a couple (damaging the new units). While it's unlikely that there is any power going to any sensor while the car is off, I'd yank the negative cable, swap the sensor & hook it back up. I worked at a Ford dealer in the late 80's and the battery disconnect was the rule of thumb for any sensor replacement (except for OS sensors).
At least if you do that, you'll zeroize any running codes that have been saved. Have a magnet stick nearby because the stinkin little bolts will fall where & when you don't need them to. I have bannana hands, so it's all I could do to not lose either bolt. Keep in mind that these bolts are quite small and that they don't need to be tightened using the Gorilla technique. Just snug.
Also, be sure that the CPS in oriented correctly so that the plate (you'll see it when pull the CPS) will rotate between the plastic "tabs" on the inside of the CS. Once you're done, connect the battery, start the car & let it run for 6~8 minutes (or to normal ops temp), then go for a drive.
Good luck!
M Randolph