Its pretty hard. You need to be able to cut the transimsion mount off the chassis, and wire it right, but if you have the toolsm and the money, its a piece of cake if you know what you are doing. though if you have never swapped a motor, i would pay to have it done, because you can f*ck it up to where it wont run right and it will be a pain.
But if you need any help, i know where there is a step by step manual for swapping a h22 into a eg on honda-tech.
that might help you.

and try searching, there is a boat full of info out there