C-Tech HD 5000C (not "Plus") and AAC sound

Hello SAT Universe! :him8

Does there exist any firmware (FW) for HD 5000C model that would enable AAC sound?
I know that Plus version has FW that does AAC sound.

• Is there anything I can do (besides buying new STB) to enable AAC sound on my dear C-Tech 5000C?
• What would happen if I loaded FW that was intended for Plus version?

Please help, I'm sure many of us have 5000(C) model without "+".