lol a package being my leveled would actull be the most unlikely thought...
You can technically summon ( in sp, and in that map) mylevel'ed stuff via "mapname.class" but thats silly.I too began scripting using myleveled subclasses in ut.(mainly since when you do that , you dont need to compile scripts or save or something) , that was lonnnng ago... i know better now.
I will point to this as a usefull resource to beginners that want to learn to use ucc to make mods, it may or may not be of help. also umake can save you a ton of time...
http://hyper.dnsalias.net/infobase/archive/wod/tutorials/guide.htm