alright. you need to right click on the my computer icon and go to properties on the computer you want to CONNECT TO. then under the "remote" tab and check the box that says "I want to allow users to connect remotely to this computer" then look at the name that is under "full computer name" because you can also connect remotely using the computer's name. if you want to change this name, you can change it under the "computer name" tab and click the "change" button. then type in the name you want. also, sometimes you can't connect if you are on a different domain or workgroup. you can also change this the same way.
also, you will be logged off of the computer you want to CONNECT TO, but all your programs will stay running.