For the record: ADE 2 will read/render text-based EPUB3s (novels primarily) just fine. You're correct that it doesn't support the multi-media aspects, or the scripting portions, or the fixed-layout portions of the EPUB3 spec, but "supporting" EPUB3 all depends on the EPUB itself. It's not like ADE 2 (or 3) says, "I can't open that." It, in fact, opens/renders many commercially-available EPUB3s just fine.
Offtopic though. My apologies, Doitsu. Back to pagelist/pagemap generation.