Hi Folks I’m a newbie. 
I’ve got RetroArch installed on a couple of computers and a phone now and despite the emulator taking a while to get used to, I believe I understand more than the basics now. But I’ve got issues with mouse and light gun games. I’ve got light gun games on MAME to work fine with my mouse, but I’m having issues with console cores.
I tried House of the Dead on the Saturn Core and I can’t figure out how to get it enabled correctly. When I do get it working it’s been impossible to select things in menu’s. Also, the crosshair doesn’t correspond to where I’m shooting, it’s slightly to the left of the crosshair.
The second game I’ve got problems with is Die Hard Trilogy (via PCX Beetle HW). I can’t configure a button to reload the gun on the mouse. Also, despite not setting any controls, the the right mouse button is firing explosives. How do I set a reload button?
Thanks in advance. 