LaunchBox will do what ever you want it to, LaunchBox is not an emulator what so ever but a facilitator between programs (even more than just emulators). I have Apple and C64 tutorials up on the channel as well. You can install DOS games any way you want to, with LaunchBox's help, without it, find them on the internet, how ever it is you want to deal with it. Point LaunchBox to your DOS games, and it will scan for the most likely exe or bat candidate, and import them in to LaunchBox, 1 per folder. It will then take the folder name and assign it that. For example, I have the entire eXoDOS collection, I told LaunchBox to look at my ../Emulators/DOS/Games/ folder, it found 1 file per folder and imported them with the folder names for game names. Sometimes I might have to edit the entry and point it towards a different bat or exe (It honestly just guesses), but once they're imported it's really simple to deal with and a very easy thing to choose another exe. Some of these games have custom .conf files, which I can also specify when editing a game, but generally speaking a good master file has worked well for me. I even replaced the DOSBox install in the LB folder with a DOSBox Daum install as I generally prefer that over default. I couldn't get DOSBox-x to work though.
I would honestly suggest you watch the tutorials, especially the beginner SNES tutorial as it also assumes that the user is new to LaunchBox so that you can learn some of the intricacies. The video tutorials we found to be extremely effective and less time consuming as it easily shows users what to do. I would be more than happy to answer any of your questions though, if you have any more.