What Freddo says.
All you need to do is to install Morrowind in this order.
1. Morrowind+Construction Set
2. Tribunal
3. Bloodmoon
There is no need to install any patches and remember it's important to install Morrowind GOTY in that particular order otherwise you'll see a lot of strange stuff.
Also, do NOT install Morrowind in any C:\Program Files(x86) related folders and turn off UAC (User Account Control) in the control panel, because if you do the game would probably not launch and that's http://www.gamesas.com/topic/781497-vistawindows-7-problems/ to blame if that's happen.
Good luck!