How to compile a module from outside the kernel tree?

[stan]

I've got a new laptop. I'm trying to get kismet to work on it. It appears
that it is not going to work with the built in Broadcom wireless chipset,
although I have been able to get that chipset to work for "ordinary"
wireless access. Thanks to all the people that have made that possible.

In any case, I have a PCMCIA Lunksys card that I have used for this purpose
in the past. It has the orinoco chipset in it. I can plug this card in, an
make it work for "ordinary"wireless work, also. But when I try to get
kismet to use it, I get a message about monitor mode setting failing.
Looking around on the web, it appears that I need to compile and install a
different module. I've located the sources to this module, but so far have
failed to get it to compile. 

Seems to me that I recall from prior Debian experience that I may need to
use something called modulee-assistant. I've added thta using apt-get but I
can't seem to figure out how to use it.

What is the "The Ubuntu Way" to compile and install a module from outside the
kernel source tree?

I'm using Feisty with a 2.6.20-16-generic #2 SMP kenel, if it matters.

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