As I stated before, did you get your wireless up and working? It seems to be a difficult issue with newbies.
What does ifconfig say?
What does iwconfig say?
I would not worry about kismet until you get your wireless up and running.
BTW BT3 is based on Slackware 12.0. There is lots of info in the slackware forum on setting up wireless
Did you read the kismet documentation?
This is the info on the rt73 chipset
rt73 Ralink 73 11g Linux rt73-gpl-cvs
Ralink 73 802.11g USB cards using the serialmonkey GPL'd
rt79 drivers (tested only with CVS driver versions)
kismet.conf is located /etc/kismet/