There are tutorials on this site, just check everything as you go, take your time, and rotate the crank two full turns to be certain that you have the cam/crank timing interference - free. Make sure you clean all surfaces before mating the new pump and don't expect the belt to slip on too easily. If you are a PD - BEW engine, then loosening the three cam pulley bolts made all the difference getting the belt on.
Also, be careful to support the engine (higher than seems appropriate) and extremely well when removing the 18mm motor mount bolts or you WILL damage the aluminum threads. Be certain that the mounts are parallel, so no twisting/bending of the bolt is occurring as they are removed. Don't ask why I'm emphasizing this!!
So, have fun, post if you have issues come up.