Making F1-F12 keys the default on Dell Inspiron 1545

I've been given a laptop at work, a Dell Inspiron 1545, which I find pretty good, except for the Dell Inspiron Keyboard F1-F12 keys.

Being a programmer and a poweruser of several programs, I need to use them a lot, and here they are inverted, you need to press the Fn key to get access to them, and you get the volume up/down, brightness. wireless on/off stuff without pressing the Fn. Is there any way (or hack) to make them the other way around?? F1-F12 just by pressing the key, and the extra functions using Fn?

Its driving me crazy! Specially turning off the wireless when I want to rename stuff!

thanks!