Welcome back!
You remember the kick message?
Which guid did you find? This one:
viewtopic.php?f=29&t=2078 ? The punkbuster setup link works for me..
Anyway, perhaps you should visit: etkey.org. I think all the information you need about punkbuster is there.
About the servers. There are ~10 servers, but only one server with players(it's sad, i know). The servers only seem to show up in the game browser when there are players in it. Only in the evening ( evening for me, GMT+2 ) there are like 8 or more players. It depends a little on the day of the week. So... yeah, not as active anymore as it was in 2006-2007.
The most active server is the one from shotzone:
http://tce.shotzone.cz/