KAM applies to EVERY Ford PCM for the last 20 something years. It has nothing to do with keyless entry.

Look, don't take this personally, but if you choose to ignore advice that is targeted and correct and choose to strike out on your own, you will do so to your regret (time, financial, and convenience, etc). You will drop $300 on a non-returnable item. There is a chance that the PCM is the problem, but there is a much larger probability the fault is elsewhere and can be located using standard troubleshooting steps.

If you'd like troubleshooting assistance, it is available. If you want validation of your ideas, talk to your buddies (they've been a big help so far, it seems).

For assistance, start with describing all symptoms. Advise if you have a meter and know how to use it.

Here is the schematic: 1997 F150 4.6 Engine Controls.pdf

Since we don't have any symptoms, it's not possible to provide additional relevant advice yet.

Specific questions:

No crank?
Does it crank but not fire?
Does it attempt to fire while cranking?
Does the CEL come on when ignition is in RUN? If so, can you hear the fuel pump run for two seconds?
Other cluster lights (all of them)?
Do accessories work?

Provide any other related observations.

Start there.

Steve