OK, I think I need to explain myself a little bit
I have worked with Retropie and Attract Mode on a pi for a while now and am comfortable navigating and editing files using WinSCP and such. For my arcade I needed to move up to a PC so I can play N64, Playstation and Gamecube games. I wanted to use Linux because #1 it was something different and I enjoy the challenge of learning something new and #2 it was free!
I downloaded Retropie through the terminal first because of my familiarity with it. I have used it to try different things like transfer files from my windows PC, edit files, and download other programs through the terminal.
My next step was to download Attract Mode and set it up from scratch. I've been able to figure out how to set up the basic menus with all the videos, wheel art, etc (fairly straight forward). I'm at the point where I need to set up the emulators. This is where I'm at now, part way up the steep learning curve of terminal commands and what they do. I know a few basic commands from setting up the pi, but still have a lot to learn.
I'm definitely open to suggestions on other emulation programs to try. I just wanted to get attract mode working before I started something else.
OK, now back to my issue
I tried running retroarch from the command line using the code you posted.
IT WORKED! Thank you very much!
Now all I need to do is enter the info into Attract Mode either sometime tonight or tomorrow.
My next question is how do I run a game/emulator that needs a BIOS? I'll assume that I will need to add a line with the path to the BIOS?
Thank you for the help and advice, I really appreciate it.