For those who are having difficulty getting Operation GHOST to work correctly in fullscreen and own monitor resolution, I leave here a little help.
(adapt the paths and filenames for your need)
Resolution 1680x1050, nvidia card and lightgun
If you are using Rocketlauncher, go to PCLauncher Module folder and put in you_system_name.INI:
[Operation G.H.O.S.T.]
Application=E:\Sega Ring\Operation G.H.O.S.T\Game Loader All RH.exe
PreLaunch=E:\Sega Ring\Operation G.H.O.S.T\OG.bat
PreLaunchMode=run
For lightgun use demulshooter, config it for you lightgun port and create a OG.BAT with line:
DemulShooter.exe -target=ringwide -rom=og
In GameLoaderALL config select:
@WildWolf
We all made mistakes, and if I made a mistake to answer a question asked on the topic "Teknoparrot Loader (v1.53 HF) | Arcade PC", giving a help (above) to solve the problem on the wrong topic, I apologize for this, but as a moderator you are, instead of having deleted the solution, you should have moved it to the correct topic. I think the forums are to help and not consider a help as an offline topic.