[CentOS] Turning Wireless Radio on and off: how?

Hi all,

I've got a Dell Inspiron 1501 with a Broadcom 1390 Wlan mini card 
(integrated) wireless lan chipset. I've got an init script setup to 
activate the wireless connection at boot time, however when the system 
boots the adapter doesn't connect. I'm not able to get a connection 
until after the desktop is done loading and I run the script from the 
command line.

After some log review apparently as the system is booting the radio for 
the wireless lan card is "off", so I need to know how to turn the 
wireless radio on just before the init script for the adapter fires off.

How can I turn on/off the wireless lan radio?

I'm using ndiswrapper and the dell windows driver for this wireless card.


thanks,

Mark