ander7724:

the most remarkable advantage from Venus is the resultant performance. With official release the QSI (Quick Search Index) and ISM (precious & better cross-boarder/blocks plan) are expected, but GS QSI is only available in limited portion of Garmin Series hardware.

I think, without confirm with syzygy, ISM is no way to work with Venus, nor could it be Venus-ed.

mentioned bin file from hardware firmware, must exist with official map, and must be removed with Venus map.