I just updated my drivers from my HP nw8440 using the new tool DH Mobility Modder.net. It runs now the last version of ATI Catalyst Drivers and after some time of usage I must say that I am happy about it.

Note: I had not to disable UAC to run the DH Mobility Modder.net, but I runned it as Administrator.

I used another tool in the past as written in my old post Notebook and ATI Drivers.

So a big thanks to Ruud Ketelaars for his fantastic tool.