When we had the house built, we asked them to put the plumbing in ready for it, so the tap under the sink for the water and the little outlet on the pipe. I will put a pic up for you....

But to install it was simple, as the dishwasher hole was already there (they are a standard size, we just bought a standard size dw) It is on wheels, so you just slide it in and pull the hoses etc through the hole in the side of the cupboard (our sink is right next to it, so there is a gap left at the top of the cupboard and bench, hard to explain) and connect it up, plug it in.

It is really really easy, the trickiest bit was having to unscrew the downpipe from the sink to be able to drill the hole in the inlet bit for the drain pipe. (Again, I will take some pics for you cos it is hard to describe when you don't have all the technical terms down pat! lol)

But all the instructions are in the book for your new dishwasher, diagrams and things.