A learning experience which should get you to "stay away" from doing OS downgrades like this. Primary reason...that OS is not supported on that hardware by the manufacturer.
Most hardware in laptop platforms that are out now was designed after Windows XP was retired. So in many cases, you'll notice that you simply cannot find WinXP drives for new hardware anywhere. Because that chipset, video card, sound card, onboard ports, drive controllers, etc...came out after Windows XP was put out to pasture. No drivers were written..nor will be.
When Vista came out...we found ourselves being asked to do this a lot..and it wasn't that bad. But we're half way through Windows 7's life now..and Windows 8 is on the horizon. Several generations of hardware have come out since WinXP was retired.
You can try to spend tons of time search for drivers, or use one of those driver finder programs..and maybe you'll be able to find some "similar enough" drivers to shoe-horn in there to get it to run and appear fine. But how well will it really run? How about all the "enhancement/system" drivers on laptops for the added functionality of hot-keys, special purpose buttons, and power management needed in laptops? Will the laptop run rock solid all the time? Or perhaps lock up once a month on the user, or frequently never come out of hibernation/standby because of poor/lacking power management drivers? Will a Windows update break a driver?