Just teasing about a computer with the memory to benefit from with highmem support....
I did encounter an issue with loading the firmware for the IPW2200 - I can see the kernel information in /usr/src/debris-2.6.28-highmem-dl-11/include/config for the IPW2200, but it does not seem to find the firmware - it does without issue with the standard kernel (so I know it is installed).

So I started digging...

It appears the /lib/firmware/2.6.28-highmem-dl-11/ is empty - unlike the /lib/firmware/2.6.28-dl-11 which has the firmware.
I used:
sudo cp -r /lib/firmware/2.6.28-dl-11/* /lib/firmware/2.6.28-highmem-dl-11/
That did seem to work - I am connected via wireless now and it did boot past "Loading Hardware Drivers" without any errors this time.

I don't know if that was the "proper" fix though for long term use....
J