@BadMojo12 ok understood. Advmame can be installed as an optional package. I think it used to be installed by default but now its one of the optional packages. You'll need to become familiar with the Retropie directories. Can you get your pi on your network and drill into it from your pc with ftp or ssh? I use ftp to copy roms and move files around, and ssh to edit .rc files. I will also use a keyboard on the pi to run tests. Just about everything I've learned came from these here forums and the documentation.
ws