PCB Drilling G-code from EAGLE

The August (#181) issue of Circuit Cellar magazine (www.circuitcellar.com)
contains an article that may be of interest. "Analog Tips and Tricks" by Ed
Nisely. He discusses, among other things, how he makes prototype PCBs and
drilling them with a Sherline CNC mill. He wrote a program using EAGLE user
language program (ULP) to produce G-code. To quote the article "The ULP
sorts the holes by drill diameter and then visits each hole in
nearest-neighbor order." The ULP code is available at:
ftp.circuitcellar.com/pub/Circuit_Cellar/2005/181/
You want the file Nisley181.zip
Hope someone finds this useful.
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Keith Bowers - Thomasville, NC