GF 7600 go dual screen problem

[kenyapo]

Hi;

I need some help for my osx installation. I have Toshiba A100-289 laptop with GF 7600 go graphic card.

 

1- I can't find any solution for external display (didn't work). Internal display works great with Natit. I use Natit dual drivers as also and failed.

 

2- I can't change my LCD brightness with FN keys because of this my battery finishes very quickly.

 

Regards