I have a new Compaq Presario 1500 laptop, running Windows XP home.
In the bottom left corner of the keyboard, where the Ctrl key should
be, they put the [Fn] key.  They placed the Ctrl key one key to the
right.
How can I remap these keys?
I have found articles on how to remap, but cannot find the scancode
for the [Fn] key.

I'm afraid that after doing some research, I have to say that this
isn't possible.  The FN key doesn't return a scancode - instead, it
modifies the scancode of the key it is pressed with, inside the
keyboards circuitry.

Linux on a Compaq 1711T
http://www.its.caltech.edu/~wagenaar/compaq_linux/
Information on the overall details of the running Linux on a Compaq,
however the information that is of use to you is about 1/2 way down.

Linux and BeOS on a Compaq Presario 1800T
http://www.goingware.com/laptop/
Again, about 1/2 way down the page is a section entitled, "The damn Fn
Button"

From personal experience, I can say that laptops do include some
'fancy circuitry' into them, which enables them to do things like set
the brightness/contrast in hardware (using the Fn key), and this
bypasses the normal BIOS systems - in effect, the system never
actually sees the Fn key, so you can't remap it in XP.

I'm sorry it is not possible to re-map the Fn key, however you at
least be satisfied in knowing that a lot of other users of the Compaq
systems also dislike this button.

Search Methodology
------------------
how the compaq FN key works
://www.google.com/search?q=how+the+compaq+FN+key+works&hl=en&lr=&ie=UTF-8&start=10&sa=N

how the FN key works
://www.google.com/search?sourceid=navclient&q=how+the+FN+key+works

compaq presario FN key scan code
://www.google.com/search?sourceid=navclient&q=compaq+presario+FN+key+scan+code

LazerFX-GA

Not the answer I wanted to hear, but I learned a lot in the process.