Just one caveat, a minor one for these purposes, but important
philosophically: even if God is omnipotent and omniscient, it doesn't follow
that He can actualize just any possible world.
Suppose there's a possible world in which I freely go my entire life without
ever once yielding to sin. (A very different world from the actual world, I
can assure you.) Whether such a possibility is in fact actualized is
largely up to me, not God, if I have free will. My free choices are (by His
will) my own, not His.
John