Can a psionic-but-no-manifesting creature use psionic powers? such as Elan with some Aegis class level?

Can a psionic-but-no-manifesting creature use psionic powers? such as Elan with some Aegis class level. Normally not but there are some “tricks” Such Elan’s trait the character gain “wild talent”. As he choose to be Aegis “wild talent” become “psionic talent” ( described in Elan section). At this point he must spend 1 talent more for “Unlocked Talent” feat and gain ONE first lv psionic powers (described in chapter 5 Ultimate psionics)…. but if GM consider it appropriate “psionic talent”=”Unlocked Talent” (In campaigns where psionics is more common-place, it is recommended to remove the prerequisite of Wild Talent from Unlocked Talent and substitute the Unlocked Talent feat for Wild Talent to represent how the ability to manifest powers is common within the world.). It’s all right? And then spend one more talent to gain “Access Psionic Talent” and learn five 0 lv powers. Right?