On a mental level, one can achieve presults by programming himself with previous descriptions of the impending subliminal. His mind makes up the affirmations/scripts for what is to come and hence he achieves presults and precons.
On an emotional level, we can say that it is the heart that builds up the excitement for such a subliminal and hence builds an emotional “script” of what one can achieve. A strong desire for the wish fulfilled (of the soon to come sub) is enough to achieve the corresponding presults.
On a spiritual level where one is energy and their auric fields, one can say those scripts are built anticipating the energy and aura of the coming subliminal. One can also theorize that if there is no time for the spirit and hence everything is the present for it, then the subliminal we want or desire is already being run and hence the presults.