A simple tip for XP
By default Windows XP displays only 6 programs under start menu.
Right click on the taskbar – properties – star menu – customize. In the general tab under programs increase (drop down menu) the number as you like (Max 30).
One important thing you should remember here that, if you are increasing the number more than 10 you should choose small icon .Big icons will not accommodate in start menu. This option can be seen on the same window.
Source A2ZTips and Tricks