Yes, thanks. 
  
Woooops!  Well, that made a mess........ 
  
Entirely my own fault, I placed the kext in my Extra folder, ran the EDP to rebuild mKext, and rebooted. 
  
And spent the next hours re-installing OSX.  
  
Could not even boot single user.  
  
The problem was that after installing Lion, I ran multifail, wich went fine, but in combination with the kext's already residing in /Extra, running EDP wasn't such a great idea. 
  
Learned a lot though. 
  
The Kext did help though. Even with only a part of the booting proces completed, I didn't see the nasty dimming anymore. 
  
So it was the cure, now I only need to give it in a proper way. 
  
Not today, maybe tomorrow, or maybe I will just wait for EDP 2.0. 
  
Thanks for your help, Leon.