FPS Issues/Modded drivers?

Hello i have a few question on the fact that i know this is being brought up too many time at this site but, when playing StarCraft 2 i have very low frames per second. The thing i did when trying to fix this issue was to upgrade my driver i currently have the newest driver the 267.76 and it did not make a dramatic different as well as all the other up dates to the Nvidia driver updates. My main question is their a modded driver that i would be able to download (instructions would be very helpful ). I downloaded the 258.96 modded and when playing SC2 i was able to play on high with no lag at all. The reason why i decided to get rid of it was because of the warranty but at this point i stopped caring about it i just when to play a single game of SC2 without lag. If their is a way to make the game run more smoothly without a modded driver please inform me. Some of the things i did already was YES i whitelisted SC2 and i don't know how to update the BIO from the dell site because i tells me that I dont have a folder to put it in idk. Also just how are people running SC2 on the newest driver on med to high and i cant its just wield if anyone can help me it would be great.

~Wed_Head241

 

modded drivers don't affect the warranty.

 

oooo good know where i got find the latest one?

 

http://forum.notebookreview.com/alienware-m11x/510346-modded-optimus-drivers-collection-r2.html

Here are the modded drivers. These might be a bit old though