How do you set up a 2-bar MAP sensor and an EFI Live custom OS for boost, and can you still do normal AutoVE tuning?

Here is what the documentation says. Each point links to its source; tables and names vary by computer, operating system and tuning software.

• P01, P59; LM7, LQ4, LQ9, LS1, LS2; 1999-2007: HP Tuners' 2-bar/3-bar MAP support (the 2.5-bar custom OS) adds a Boost VE table spanning 105 kPa to 255 kPa with better than 5 kPa resolution in the boost region, retains stock VE resolution in non-boost areas, adds a MAP-referenced Boost Enrich table in 5 kPa steps, and runs in speed-density mode only. (HP Tuners)
• Sources differ: Conflicts with simpler '2-bar good to 14.7 psi' statements; the OS boost tables actually read to 255 kPa when paired with a 3-bar sensor.
• E38, E67, E92; LS Gen IV; 2005-2013: E38, E67, and E92 ECMs can interpret 2- or 3-bar MAP sensor readings, but the MAP calibration data still has to be changed if the ECU was not originally calibrated for a supercharged engine. (LSX Magazine)
• LS1B; LS Gen III; 1999-2006: Stock 1999-2006 LS1B ECMs cannot measure more than 1 bar of manifold pressure (about 14.5 psi or 105 kPa); boosted combinations need a 2- or 3-bar MAP sensor with corrected sensor scaling. (LSX Magazine)
• E38, E67; LS2, LS3, LS7; 2006-2015: For boosted Gen IV swaps the controller must be set up for a 2- or 3-bar MAP sensor, since the factory calibration only models naturally-aspirated manifold pressure. (LSX Magazine)

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