Run around killing mobs for like 5 minutes.
During those 5 minutes use the Mesher with "Mass Mesh" enabled.
Also during this time you use the Profile Maker periodically clicking the add hotspot, and targeting and using the "Add Mob" button to whatever to want to kill.
Then save the mesh as "Whatever" and save the Profile in the Profile maker using the name of the mesh you just made.
Open up your newly made profile and change the "GrindTo" to whatever you want it to level to, as well as add vendors if you want.
That is a pretty simple explanation, but it is also really simple to make profiles.
Also look at other profiles if you need more help with vendors or whatever.