I have an HP Pavilion ze5354ea notebook which also has the onetouch keys, below is an extract from my webpage from linux on laptops showing how I got OMKE running, as you know HP & Compaq are now the same company so you should (hopefully) find this will work for you as well as it has for me.
HP One touch buttons (Including volume controls)
Download the latest omnibook module from http://sourceforge.net/projects/omke
Unpack it, anywhere you like.
**NOTE** Any commands issued and answers given are in bold
I opened a terminal in the unpacked directory,(which was on my desktop) and I gave these commands:
root@silver:~/Desktop/omnibook-2004-01-20# make install
That's it the modules are installed, now its time to start them up.
But because I read the accompanying docs I knew my model wasn't on the supported hardware list and as
such they wouldn't start properly, however I had read the supported list in /docs/readme and at the bottom of
the page the developer suggest trying to load different firmware, so I picked the closest model to mine which
was in group 7.
The command I gave to load the module was:
root@silver:~/Desktop/omnibook-2004-01-20# insmod omnibook ectype=7
If you want to verify that the module loaded simply enter lsmod at the terminal,
as I recieved no errors when I gave the command I know it's ok.
Now you will want this to load and work after every boot,
to do this simply edit the /etc/rc.d/rc.local file and add
insmod omnibook ectype=7
to a new line at the bottom of the page.
Now for the best bit, assigning the one touch keys to applications.
Lets assume you want to assign the one touch mail button to open KMail.
Open the K menu and select the "Menu Editor" from the "Settings" section.
Or right click the K menu and choose "Menu Editor" from the pop up.
what you will see of the left hand side is a copy of your Kmenu click on the + beside the Internet section it will
open up and you can see KMail about 1/3 of the way down the list,
Click KMail and the right hand side suddenly becomes active, at the bottom there is a buttom called
"Current shortcut key" with the word "None" in it, click it and when the popup opens press the one touch button
and the popup disappears now in the box that said "None" it now says "XF86Mail" or something similar.
You have successfully assigned the One touch Mail button to KMail, carry on and assign the rest of the
keys to whichever functions or applications you require, and then "Save" your choices in the "File" menu.