I'm back!
I have read and can you explain
You said how to create map or server with mac but do you know how to do with windows?
You can configure it by loading the .html config file. It is located @ "~\BZFlag\misc\bzfs_conf.html" (~ is for /home/you or what ever, I run linux, Windows guys, figure out where you installed BZFlag to, its in there...) that will configure your server, how to run it is beyond me, sorry, I run it on linux.