I'm trying to help someone out with IGO8, but my unit is a non HD unit and his is HD.

Besides the obvious (bold), what else needs to be done to the sys txt to make it HD 800x480? Plus any other files need to be changed?

[folders]
;app="%SDCARD%/iGO8.3.2"
TTS_LOQ="\Storage Card\IGO\TTS_LOQ"

[interface]
skin="ui_igo8"
resolution_dir="480_234"
vga=0
show_zoombar=1
maxzoom2d=6000000
minzoom2d=40
show_exit=1
defaulttilt3d=7600

[rawdisplay]
class="landscape"
highres=0
screen_x=480
screen_y=234

[debug]
enable_roadshadow=1
show_residentonly=1
enable_roadsign=1
enable_landmark_occlusion=1
show_oneway_3d=1
show_oneway=1
show_gps_pos=1
show_signpost=1
background_navigation=1
screen_calibration=1
skip_eula=1
;max_memory=25000000


[map]
2dheadup=1
3d_max_tiltlevel=10000
3d_max_zoomlevel=3000
3d_min_zoomlevel=40
3d_max_zfar=2000
stop_rotate_on_map_move=1
inertia_on_map_move=1
follow_gps=1
2dheadup=1
3d_scale_carmodel=1
3dcarsizemin=30
3dcarsizemax=40
3dcarsizemul=20



[poi]
poi_show_all_btn=1
poi_labels=1
show_poi_boundingrects=1
show_poi_areas=1

[navigation]
show_current_city=1
show_countrychange=1
autoreplan_action="AUTO"
gps_pos_to_road=1

[smartzoom]
minangle=0
maxangle=85

[msnd]
enabled=0

[map]
3d_scale_carmodel=1
3dcarsizemin=3500
3dcarsizemax=5000
3dcarsizemul=10000

[tts]
tts_buffer=131072
announce_exit_directions=1
tts_logics=3
priority="HIGH"
always_say_road_names=1
announce_street_name=1
skip_exit_numbers=1

[sound]
ding=0
queue_length=200

[timezone]
patch_dst=1

[timezones]
use_timezone_setting_fix=1
use_new_timezone_ini=1
timezone_key="Time Zones"

[3d_config]
disable_roadsign_navigation_mode=0

This is my sys.txt from my pda (800x480)
It's from Primo1.1 but should give you the resolution settings...

Make sure the data.zip has the 800_480 folder within it.

[gps]
port=4
baud=4800

[interface]
resolution_dir="800_480"
extra_settings=1
vga=0

[navigation]
sim_speed_factor=3.0

[power]
backlight_sync_with_OS=1

[rawdisplay]
driver=GLES
screen_x=800
screen_y=480
class="landscape"

[route.histspeed]
enabled=1
show=1
use_timeslice=1

[sound]
ding=0
queue_length=200
mute_os_key=1
pause_mp3_sooner=1

[speedcam]
enable_at_startup=1

[tmc]
enable_subscription="1"
saved_config_available="1"
saved_config_classname="NMEA_GPSTMC_ROYALTEK"
saved_config_portname="COM"
saved_config_port="2"
saved_config_baud="38400"
auto_band_search_up="1"
auto_tuning=1
saved_last_tuning_mode="1"

[tts]
automatic_direction_conversion=1
tts_buffer=131072
announce_exit_directions=1
tts_logics=3
priority="VERY_HIGH"
always_say_road_names=3
announce_street_name=1
skip_exit_numbers=0