well...since that other method has been abandoned apparently...your best bet would be to run some kind of stat tracking program, either hlstatsx or psychostats
Provided this is a standard dedicated gameserver...you need another host running a database and a few other things. These programs basically read the log files and track either where ever people die, or where people are when they get kills. In my experience psychostats has a tendency to fail, and ive never ran hlstatsx. For a first time doing something like this...expect hell <_<
And thats all for the actual data, beyond that you need to use cl_leveloverview x (i guessed on the command, might not be right) where x is a number. Take a screenshot, edit it, go in the level and get the coordinates of the edges of the picture. Then give the coordinate to the program.
Then provided that all works, there needs to be a bare minimum of 1000 kills to see anything useful, 7000 is better.
Though the idea of generating the logs with bots fascinates me...but I figure bots still work on barely any maps right?