Okay, I got wifi-radar working... it took installing a custom kernel (mainly so I knew where the modules, sources, etc. were really installed) - follow these directions:
After the new kernel is installed use the patch to allow the(in my case) Orinoco Gold Pcmcia card to scan (It does not have this ability without the patch). One source of the patch is here:
I used "orinoco-0.15rc1.tar.gz"... from what I understand, it the one that's supposed to work with the 2.6 kernels... and it does.
Oh, and the kernel I installed is 188.8.131.52 from www.kernel.org.
After the new kernel is installed and patched, all there is to do is install wifi-radar - move wifi-radar to /usr/sbin (make it executable by typing "chmod +x /usr/sbin/wifi-radar), then move wifi-radar.sh to /usr/bin.
After a reboot (so the kernel can realize it can scan now), wifi-radar is started (from a root terminal) by typing "wifi-radar.sh".
Now, as easy as it is to open a root terminal in Ubuntu, I wanted to be able to start wifi-radar from an icon - as much as this makes me gnash my teeth in Gnome 2.10 (that I can't add launchers to the Applications menu - grrrrrrr... but I digress...) So, what I ended up doing, and it works, was to go to a root terminal, and type "visudo" to edit the sudoers file. After going down to the end of the text, I added "username TAB ALL=/usr/bin/wifi-radar.sh". Username would be YOUR username, then nothing after that but one hit on the TAB key, then typing the ALL=/usr/bin/wifi-radar.sh. Save by hitting the F2 key and when it asks whether you want to write this file as sudo, say "y" and it will.
After all this, I added a launcher to the bottom panel.