Access to component instances in externel actionscipt files

hi everybody,

I have made a single movieclip using many buttons and movieclips in Flash CS3. I have defined a linkage class file for the movieclip. Now I want to access the buttons and movieclips within the main movieclip in external Actionscript files with their instance names. I was unalbe to do that. Anyone who can help me on this. Thanks in advance

Nav Raj