These become available on the menu with the 'New Game' and 'Continue' options when you complete the corresponding task. When you have unlocked ALL the icons an alternate 'Title' screen will become available.
Unlock Rockman Star:
Complete the main story line.
Unlock G Comp Star:
Collect ALL 5 Giga Class Cards.
Unlock M Comp Star:
Collect ALL 42 Mega Class Cards.
Unlock S Comp Star:
Collect ALL 150 Standard Class Cards.
Unlock Mu Continent Star:
Defeat RaMu Xa.
Unlock OoPart Star:
Added by: Sanzano Jan 19th 2009, ID#10080