Depending on the aircraft, class configuation (169 or 189, or custom) and configuration, ie CAT C or CAT D your airline has certified the 800 for, will determine many of the varibles you are asking about.
Vspeeds, Vref and flap schedules are based on weight of the aircraft. Flap speeds are updated from the FMC and are based on Vref40 +and additive based on flap setting.
Idle thrust point is variable, especially if you are on a coded procedure.
Not sure what you mean by ht above threshold...are you talking wheel ht?
Last edited by underfire; 23rd October 2013 at 20:57.