Sure you can upgrade...I put an Intel Quad Core Q9550s in mine. As long as the processor is 65 watts upgrades are possible with Slimlines....try BFG 9400GT low profile video card...Cheers
Please explain how you put a desktop LGA 775 processor into a mobile Socket 479 machine? This should be good.
You obviously don't have the same system as the OP's.
To the OP: you should be able to upgrade to a Pentium M. Depending upon the Chipset in your system, you may be able to get one with 533 fsb. Otherwise, stick with 400MHz fsb Pentium Ms to be on the safe side. The fastest Pentium M is 2.2GHz, I believe.