Batman: The Caped Crusader

[Florida]

So I scored the floppy disk from the Penguin, the diskette that has the "VIRUS" written on it. Took it back to the Batcave to see if I could put it in the Batcomputer. Turns out, Batman doesn`t own a 5.25" floppy drive.
Then I thought I would go up the ladder from the Batcave, up to get a beer from Alfred. He refuses to climb the ladder. There are two, non working.
http://www.amiga.org/forums/album.php?albumid=184&pictureid=1115
 
Question: When you get to the scene that says "Stay Sharp" and you use the 'dagger' the only thing you get out that is extra points. Another place you get the hint that the door can only be entered from the interior by the scene: "Only one way to solve this".
"Dusty office" and
"Shadows everywhere" is supposed to tell me what?

[rednova]

Dear Friend:

A long time ago, I went to youtube and found the longplay for batman
the caped crusader. It shows you how to win the game from start to finish.
If you watch it, you can learn what to do.
Please try that.
Cheers !!!