I used to use XG-HD modded drivers form my 9680 (6800 ultra) but they don't support laptop installs with their last releases... so i just mod the desktop one myself by replacing the .inf file then merging the .reg file :P fun easy and good.
If you're confused, then you shouldn't be messing with these things. Next, you'll screw something up with the vid drivers, get blue screens, and come crying to the forum about the declining quality of Sager.
I can ALMOST agree with the idea that if it works, then why fix it? but you seem to fail to relize that with each new driver comes speed and IQ improvments, worth the 10-15 min (MAX) to properly switch drivers.