Originally found
HERE: XDA-Develpoers
[folders]
app="%SDCARD%/iGO8"
save="%SDCard%/iGO8/save"
[interface]
maxzoom2d=6000000
show_exit=1
popup_info=1
poi_show_all_btn=1
[rawdisplay]
highres=0
screen_x=800
screen_y=480
class="landscape"
[debug]
show_oneway_3d=1
show_oneway=1
show_gps_pos=1
skip_eula=1
show_pedestrian=1
poi_labels=1
show_arrows_on_route=1
tts_min_ready_wav=1
tts_getaway_time=200
tts_expected_engine_delay=1400
reserve_memory=2097152
sound_q_length="200"
no_file_cache="0"
cache="1024"
enable_roadshadow=1
[map]
popup_info=1
show_labels=1
3d_max_tiltlevel=9000
[msnd]
msnd.start=0
[tts]
tts_buffer=131072
tts_logics=3
priority="HIGH"
always_say_road_names=1
announce_street_name=1
announce_exit_directions=1
skip_exit_numbers=0
[sound]
queue_length=200
I have blended the above sys.txt with the one posted at the beginning of the thread. It is attached below. Try it and see if it works for you.
But I am still having problems seeing full screen landscape when screen is set to device settings. It works in portrait or landscape, but not both on device settings.