How do you change the AOA in autofcs to hold at something other than 40 degrees,is that what post burn button does? It seems that I tried using this,but it didn't work,any info would be great.Thanks
I guess you mean AoA at Entry Interface point. If this is the case just insert your desired AoA value int he AutoFCS dialog box before deorbit burn and the autopilot will hold that AoA at Entry Interface.
Keep in mind though that, regardless of the value you typed in, the AoA will be changed by the autopilot during reentry to keep the shuttle on the desired profile (same for the bank and yaw)