As far as I understand the answer is "no" to both.
Logically, they did not exist when generating Psychic dice, therefore they do NOT add to the dice pool, and since they were not there at the beginning of the phase, they are ineligible for generating powers.
I however tend to avoid Summoning entirely.
Originally Posted by neilbatte
if you squint the Sigmar stuff doesn't all look like the love children from a Necron and Blood Angel orgy.