2) Modify the start position. By default the plugin creates the start position of the star at a slight offset to the view center. Modifying the start position varies the pattern. The pattern is defined about the document center (not the view center) and changing the start position modifies the distance from the pattern center and the pattern size and overlap of the four 'corners'
3) Click the basic pattern (settings1) to set the plugin into basic pattern mode. The pattern mode takes the shadow / fill etc into account
Manual for the Star Burst plug-in for Illustrator CS5 CS4 CS3 CS2 etc