Hello,
Do you want the XP version of free cell, or is it that you just want freecell installed in windows 7?
To addd freecell to windows 7:
Click on Start
In the search programs space type in "Turn windows features on or off"
Now in the menu - find "Games" expand it and now select "Freecell" (make sure the box is ticked).
Done now you should see freecell when you click start -> all programs -> games