Thank you too for your comment, I'm trying to get things done on emulator. Looks like it works flawless when I'm recalling 480_272 skin but I can't see baseline buttons.
Editing sys.txt with 480_234 makes things crash on boot, looks like there isn't any igo9_ui/480_234 skin over there :\
I think I must stay with 8.3 that's somehow working.
I've also found a torrent with an empty igo9 primo with loquendo TTS support but not working because of skin
Spoiler: Torrent page
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