Drag & Drop help

[SIZE=2]Hi,[/SIZE]
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[SIZE=2]I need a few answers and pointers for my game[/SIZE]
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[SIZE=2]Image: http://img161.imageshack.us/img161/7373/pairsgamewz8.jpg[/SIZE]
[SIZE=2][URL=“https://mail.hud.ac.uk/exchweb/bin/redir.asp?URL=http://img161.imageshack.us/img161/7373/pairsgamewz8.jpg”]
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[SIZE=2]First off, is it possible for a graphic to be hidden once a movie clip has been dragged over it?[/SIZE]
[SIZE=2]The plan is for the grid to be covered in question marks, until the users drags the small smiley over the same large smiley at which point the question mark will be hidden revealing the large smiley.[/SIZE]
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[SIZE=2]The user then gets a 2nd chance to match up the other remaining smiley, if they fail to get the right smiley is it possible for the question mark image to appear back over the top of the smileys?[/SIZE]

[SIZE=2]I’m beginning to lose faith in Flash, and this game, thanks for any help, its much appreciated
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