Well for anyone interested, since there was no real way to determine if this laptop was able to support the quad core processor till I have the money to just try it and see if it works, I have gone with what I know is possible from others experience as far as the upgrade goes.
What I upgraded:
-- RAM to 8GB DDR2
-- CPU to Intel Dual Core Extreme X9100 3.06 GHZ
Just the above made it run better as far as loading and processing info. I did the heat mod, and that helped a lot with the cooling. The only problem is that the X9100 CPU demands a lot of wattage, so as expected it caused greater heating issues, though not as I expected. Instead of the CPU heating up a lot which it actually is cooler than the previous on was, the GPU had trouble. I suspect somehow the extra juice and heat is getting transferred to the GPU chip somehow, and that's why it has problems. So I invested in a cooling pad and it seems to keep the temps within acceptable ranges, but without it, it is impossible to play anything that is graphic intensive because the GPU overheats and the screen goes crazy!
Another thing that I found, because some people have been trying to control the fan, NoteBook Fan Control,
http://www.lifehacker.com.au/2014/04/this-handy-tool-keeps-your-laptops-fan-under-control/it has been great for controlling the fan in this laptop, any of the ASUS profiles in this software work, and I can turn the fan to 100% constant when I am playing and then set it to a constant 37.5% or so when I am just doing normal stuff, because I hate how this laptop allows the GPU to get to 80 degrees C before it kicks the fan on for a few seconds, and then lets it heat up again. Very annoying, now it stays between 40-50 degrees C when I am doing normal stuff at 37.5% fan speed.