Hello,
 
I have Asus EN8800GT edition with big cooler. 512 mb.
 
I dont understand, when i install drivers, it installs nvidia ones. I mean it doesnt show Card as EN8800GT but as 8800GT.
Nvidia corporation. I know once i succssided to install asus ones. it shown it as asus corporation and SmartDoctor did work. Right now it says: "Can not find asus graphic card".
 
any help please ?

You have to unintall the old drivers (clean them up using Driver Cleaner) then install the driver from ASUS.