FITTING A BASIN

I am guessing you have the square one then. You need to fit your waste as normal, Send the waste through a hole in the surface you are placing the sink on and make your connections underneath. I use plumbers mait as a sealant when tightening the outlet. You then need to think about your taps. Since they are totally separate from the sink you can use what you want. Most people would use a monobloc riser though, secured to whatever surface you are laying the sink on.
You don't say how much you need to know about connections / plumbing etc. Please ask again if you are stuck with these.