Never read that much BS that I felt like I need to create an account to rectify something. First of all using desktop drivers on mobile video cards does nothing at all, all cards are based on different chipsets with their mobile equivalent. Also as far as thermal goes, the graphic driver doesn't control the fan unless forced, if you've edited a BIOS in the past you would have known that the fan speed changes according to specific thresholds set up in the BIOS. Also if we sticked with stock laptop drivers, well we would be months late since nVidia doesn't supply drivers themselves for mobile GPUs. This is why people learn how to modify driver's infs to allow for desktop drivers to install on mobile graphic cards, and this is why there is a whole community dedicated to do that at laptopvideo2go.com
Appart from that as long as your temps are fine you should be OK, but you might run unstable, just might. Anyways no damage can be made unless the thing overheats like crazy and reaches the 100c range. Also I have my own 9800m GTS running on the 177.41 drivers and I might install the 177.92 soon since I've heard only good about them. I've been running desktop drivers for my mobile graphic cards all the time and no nothing bad happened, just keep an eye on the temps but that is a golden rule for any computers.