This tutorial shows people who are willing to switch to Linux how they can set up a Linux desktop (Ubuntu 7.04 Feisty Fawn in this article) that fully replaces their Windows desktop, i.e. that has all software that people need to do the things they do on their Windows desktops
Read it at howtoforge
I want to say first that this is not the only way of setting up such a system. There are many ways of achieving this goal but this is the way I take. I do not issue any guarantee that this will work for you!