I have recently been mailed by friends small games on MS-Excel finding the
same to be programmed on Macromedia Flash. How could such an application be
linked or pasted?

Suppose I have an introduction screen on Flash and want the same to be
displyaed on worksheet, does anyone have an Idea, how can I do so.
Furthermore, such files were also found to be working while the macro level
security was turned high. How could this be possible?