You do not need to reset the PCM. Just swap the injectors and go. I have done this on 3 Jeeps now. Resetting the PCM does nothing, it will learn your fuel trims really quickly as you drive anyway.
98 5.9 ZJ - 4.5" lift, 33x12.50 MT/R Kevlars
02 Z06 - Supercharged, E85, lots of rwhp, built and tuned by me