I forgot if you have a add on wireless card or built in wireless but most laptops have a "mini" PCI slot that is usually used for a built in wireless card.
If you can get access to that slot, you can use an adaptor to convert it to a full size PCI slot and use a PCI video card. The only drawback is that a full sized card would definately not fit in a laptop and you'll have to cut holes in the case for it to stick out the bottom. You'll also have to use an external monitor and
your battery life would be reduced by the massive power draw of a full size PCI graphics card.
http://www.newegg.com/Product/Produc...82E16814133134
So may be possible but not practical.
Anyway, download and read the service manuel. It shows you how to take you laptop apart (you can also change the ram, hard drive, processor, and replace the thermal pad on the HSF with AS 5 while you have it apart)
http://h10025.www1.hp.com/ewfrf/wc/m...product&cc=us&