Linksys wireless nic

[Randy Patterson <tech@patterson-pcc.com>]

I am in the process of trying to get a Linksys wireless network card up and 
running. I have downloaded the DriverLoader from Linuxant. The file I am 
using is 'driverloader_2.37_i386.deb'. When I try to install this package 
by "dpkg -i driverloader_2.37_i386.deb" I get the following error;

No pre-built modules for: Debian-4.0 linux-2.6.18-4-486 i686

I am then told to install the package 'kernel-headers-2.6.18-4-486' which 
doesn't seem to exist by using aptitude search. I had installed Debian using 
the "Debian 4.0 i386 kde" cd which I assume didn't install the source 
headers. My problem is this PC isn't connected to the Internet so I need 
a .deb file that contains the Linux source headers that I can move to it to 
install but I am not sure what file I really need.

Or, if I am totally off base or going in the wrong direction for getting a 
Linksys wmp54g wireless working then let me know. I'm still sort of a Linux 
newbie.

Thanks,
Randy