Thanks Tony. I am using Project 2007. Can I do what you suggested with that version and if yes, how?

The reason why I grouped my milestones as sub-tasks and used roll-up is just for display purposes so that I can get all of them on one line. But if there is any other way to 'draw' 4 milestones on a single line and have the links pointing to each of them, please let me know.

Sorry for the basic questions. It's my first time using Microsoft Project and I am just using it to draw a good gantt chart, but not actually managing the project with it.. at least not yet.