He stated the model in the OP.
If you can get to your mpcie slot then that is your only option. Mpcie is where your wireless card is plugged into so you will lose your wireless. You will need the pe4h-pm3n + a psu + a graphics card. This will be a diy setup, but a vidock is the same parts with a case. The different sizes of vidocks come with different wattage power bricks. But since it only comes in expresscard, you can forget about it.
It's a lot easier and cheaper if you just get a laptop(or desktop) with a good graphics card but I'm assuming it's too late to return your laptop.http://www.hwtools.net/adapter/pe4h.html
Do note that you will only get 25-50% of the actual gpu performance because you will be running at x1. And you will need an external monitor.