Spud's levelme zone is just a zone he added that loads the loading.cfg file.
The loading.cfg file is a real zone.. just not one you visit in EQ Live. Loading zone = zone your characters are in on char select screen when you click on them and view them.
You can also goto the tutorial zone and run around there, check out the graveyard for the funnies~
If you want to create a zone, in EQAdmin, goto zones tab, add an entry, and name the zone what you want, longname (West Freeport), shortname (freportw) and then tell it which zonefile it uses for this zone. like, Spud has "Leveling Zone(? not sure!)" "levelme" and it uses loading.cfg file
But I'm not good at explaining techy stuff, and I've probably confused you.. so onward we go!
As for the NPC that levels you, that's an NPC Script. Image posted instructions on how to make them in one of the forums here... it's sticky.
Basically, you create a directory called Quests, then make .txt files for zones and add quests into them, like what keywords a creature responds to.
Well, enough of my babble. Good luck!