Homebrew PCBs

Hi Guys,

I am trying to open a file with a CKT extention.

I put a copy in the files section as pcb.zip with the file as 
KPsch.ckt in the zip file.  there is a text file there too.

Can anyone shed some light on what programs open this  ?  The guy 
that wrote the article I got it from said Circuitmaker and Traxmaker 
format, but I'm not familiar with those.

I'm using Q-Cad and Eagle and ExpressPCB, so I'm limited on the types 
of files I can open.

This file was from a magazine article that is posted on the web so is 
not proprietary.  if someone can open it and wants to play with it, 
and wants the link to the article so they can read the text, let me 
know.

Dave