Te pongo las opciones de ejecución de mi ini, aunque me parece igual que el tuyo


### 090_nintendo64.ini (mamewah v1.60) ###

emulator_title Nintendo 64

### List Generation Settings ###
rom_path C:\Program Files\Project64 v1.5\roms
rom_extension zip
dat_file
nms_file
catver_ini_file
list_generation_method rom_folder

### Execution Settings ###
emulator_executable c:\program files\Project64 v1.5\project64.exe
commandline_format [rompath]\[name].[romext]{nodosbox}{safelaunch}
alt_commandline_format_1 [name]
alt_commandline_format_2 [name]
game_specific_config_path

### Artwork Locations ###
artwork_1_image_path c:\program files\Project64 v1.5\snaps
artwork_2_image_path
artwork_3_image_path
artwork_4_image_path
artwork_5_image_path
artwork_6_image_path
artwork_7_image_path
artwork_8_image_path
artwork_9_image_path
artwork_10_image_path
movie_preview_path
movie_artwork_no 1

### Screen-Saver Settings ###
enable_music_in_screensaver 0
saver_type launch_scr
movie_path c:\mamewah\ssmovie
movie_fullscreen 1
quit_delay 30
wrapper_executable
wrapper_commandline_format [name]
scr_file c:\mamewah\ms_pacman.scr

### External Application Settings ###
ipc_file_or_path
app_1_executable c:\cpvw\cpvw.exe
app_1_commandline_format -b=c:\cpvw\images\nintendo64.jpg
app_2_executable c:\cpvw\cpvw.exe
app_2_commandline_format -b=c:\cpvw\images\mamewah.jpg
app_3_executable
app_3_commandline_format
auto_launch_apps

### Additional Settings ###
music_path c:\mamewah\music
lcd_display_file_path
lcd_fe_text

### Settings used by MAMEWAH ###
current_list 1