How do I know this stuff? I've been using Litestep since before this OTS crap. Why, in my day, every theme was its own distrobution! You youngins complain about not being able to download a module. Why, back in the day, LS wouldn't start half the time when you got a new theme! And everything was in one big step.rc file that was 100 pages long!

http://www.shellfront.org
go to the LS docs. Hopelessly outdated, but they should help a good bit for starting to figure these things out (though funkyd00d got the evar bit down pretty good).