Item duplication -
Save the game at any point. Hold [Alt] and press [Tab] to switch to the Windows 
Desktop. Go into "My Computer/C:/Sierra". Right click the the "Sierra" folder. 
Then go to "Send To" and "Compressed Folder". You should see a folder appear 
that looks like a folder with a zipper. Hold [Alt] and press [Tab] to switch 
back to the game. Throw down the item that you want to duplicate. Save the game 
again and go back out. Go to your "Compressed Folder" and go into "Characters". 
Highlight everything in this area then hold [Ctrl] and press C to copy those 
items. Go back into the actual "Sierra" folder, then go into "Characters". Hold 
[Ctrl] and press V to paste those files. Switch back to the game. While holding 
[Shift], press 5 to reload your earlier save. Go into your inventory if it is 
not already displayed. You should now have the item you threw on the ground 
back in your inventory. However, the same item is also on the ground.