Not quite... the Ne-Points are the points at which the boost is mapped, not necessarily increased. IIRC, change the Ne-Point and the points where you choose the boost level (on your little graph) will change correspondingly.
Again, IIRC, you're correct about the gear learn. Leave it blank and the solenoid duty cycle will self learn to try and stabilise the boost (to your target) through the rev-range. It's not that clever though, so you need to get it somewhere near to kick off with.
I used to set my boost (dredging up the memories here) to 1.2 bar and the duty cycle was 50-something percent. After holding the boost for a few seconds in 3rd gear (or 4th, whatever) and achieving stable boost, the unit will attempt to self-learn and stabilse your target boost throughout the range. If you set the duty cycle to 20% or 80% or something equally way out, it wouldn't be able to hold stable boost and so wouldn't learn. You can tell that it's entered learn mode by the three asterixes "***" where the duty cycle is on the main boost setup screen (after sustained boost).
Clear?
As mud.
Note: most of the above from memory, so excuse any glaring ommisions or errors.