cpu is very easy, AMD chips have a lil triangle showing wat side to put it in. Once u set it on the socket, itl just drop into place, theres no forcing needed, so if it doesnt just slip into place, you need to turn it till it does.
ram, very easy, just push them into the slots, until they lock themselves in.
The hardest part will be plugging all the little cables into the motherboard, for power button, led lights and such, beeds, hdds power and all. But you mobo should come with detailed instructions on how and were to plug them in.
Heat sink, should be easy, just read the instructions it comes with. the stocks just clip into place.
rest is pretty much self explanatory.
If you search forums, there are links to guides with detailed explanations
My current specs:
Biostar TPower x58
XFI GTX260 Black Edition
640 WD Caviar Black
Vista Home Premium x64