Uhm, what I don't understand is why there would be a need for command line operations as a normal player. Also are you talking about that you have to enter the launch parameter? That's hardly command line. Anyway, the most common way for a community to distribute their mods is a simple ftp server and the files zipped in a archive. All the end user than has to do is to extract it and enter the launch parameter. Other maybe simplier would be to use ArmASync or even BTSync/Dropbox/... .