I placed this script in the conversation that the PC is having with a bandit on a lonely road. This script will get the number of hit dice (level) of the PC. Then it will spawn 4 each Halfling thieves(any creature can be substituted, just give it the tag of Bandir01 - 04). The creatures will appear at the waypoints spawn1 - spawn4. It is a fairly simple script that is easily modified.