Your friend got you springs for your b-day!?
Damn! I need to find friends like that!
Changing springs is alot more in-depth and difficult than an oil change or spark plug change. Only additional special tool you require on top of the standard socket sets and torque wrench is a spring compressor, like 92L coupe mentioned, you can rent or if you live in Canada, can go to Canadian Tire and borrow it for free.
Do you have a service manual? Following the manual makes the job quite easy. Not to much to remove from teh suspension.