i used arcade manager (found here: https://onedrive.live.com/?authkey=!AKDIv4QPiPnLRlE&cid=363FD9CACF4244EA&id=363FD9CACF4244EA!5380&parId=363FD9CACF4244EA!4274&action=locate) it has all the cabinet art work, attraction vids etc..)
for roms you will need to grab these yourself - in the above app you can select from which folder you have them saved to. Its bid fidley to start with but once you get your head round it its quite easy to set up arcades. i found that with the attract videos running my performance took a hit so i turned them off.
easy way to set up quickly is first hit the standard cabinet button, then view map button (this will show you the arcade layout) then use the search bar search for the arcade you are wanting to add - when you find it click on it - then on the right hand side you will see all the details art work and what core its using etc..(comes pre-loaded with cores) - you then click on the the game tab and manually select the rom file location. then the fixed location tab and select where in the arcade you want it. For lightgun games just hit the lightgun cabinet button and do the same as above.
Edit*** quick vid i made demonstrating the above method