Customize Start menu list of frequently used programs

I work with a lot of applications on my desktop PC running Windows XP SP3.
However, there are particular applications I use routinely. Because I don't like the clutter of icons on the Desktop Screen, I usually go with launching programs from the Start menu. The list of frequently used programs seems to be the most convenient for me. However, they change from time to time, depending on what I access from day to day.
What I need is for my favorite applications to be on there all the time, regardless of whether I use them more than other applications or not.
Can you please help me on how I can manually add programs to that list and make them stay there indefinitely?
