Thanks for the quick reply!
I am pretty sure I properly jailbroke the phone, as I wouldn't have been able to install and use any launchpad commands if I had not, correct? Is there some other way to test this?
Installing the .bin files could not have been easier (strike this sentence if I messed something up), and after installing I had the mplayer directory.
I'm going to try uninstalling and reinstalling and see what happens then.