Is it possible to configure Autopilot to control route but not altitude?
The thing is that I want to drive Oil Burner routes but the lack of navigation aids makes this dificult.

Yes me to, but when flying at 500ft TACAN route it is best for AP to control the course, and it doesn't work for me, when I turn of the Altitude hold switch the Joke is not moving.

[autopilot]
autopilot_available             = 1
flight_director_available       = 1
default_vertical_speed          = 1800.0
autothrottle_available          = 1
autothrottle_arming_required    = 1
autothrottle_max_rpm            = 99
autothrottle_takeoff_ga         = 1
pitch_takeoff_ga                = 8;
max_pitch=10.0
max_pitch_acceleration=1.0
max_pitch_velocity_lo_alt=2.0
max_pitch_velocity_hi_alt=1.5
max_pitch_velocity_lo_alt_breakpoint=20000.0
max_pitch_velocity_hi_alt_breakpoint=28000.0
max_bank=25.0
max_bank_acceleration=1.8
max_bank_velocity=3.00
max_throttle_rate=0.05
nav_proportional_control=16.00
nav_integrator_control=0.17
nav_derivative_control=0.00
nav_integrator_boundary=2.50
nav_derivative_boundary=0.00
gs_proportional_control  = 18.0
gs_integrator_control    = 0.33
gs_derivative_control    = 0.00
gs_integrator_boundary   = 0.70
gs_derivative_boundary   = 0.00
yaw_damper_gain = 1.0

I want AP to control the turns while I control the altitude. (When I turn the Heading hold switch to OFF, I want to control the altitude, if it is possible)
What is the difference between NAV and NOR.