PSacramento,
I linked to that other thread because my comment there was precisely on your question (if maybe a little off-topic there): I think we should not be hasty to identify any "negative spiritual character" to "Satan" if the texts don't. This may be the natural thing to do from a later "orthodox" perspective, but there is probably more diversity in early Christian beliefs. The aeon(s) who keep this "world" in darkness in a proto-Gnostic context are not necessarily as "bad" or as antagonistic to the Father as Satan.