WP7 c# question for someone new.. please help!

So Ive been researching and trying to find a way to do this for days now and I just cant come across the right information so I don't think I know what im looking for.

I need to know how to do a couple of things(they seem simple enough in my head, I just dont know c# well enough).

I need to be able to click an image > populate a pop up menu containing text options > user selects one of the options listed > original image changes.

Better explanation..

Image of mountains > click on image > Menu pops up with options such as: Sky, Grass, Water > Select an Option > Image of mountains changes to selected option.

@Modrn: That's a very basic task. Many ways to do that in Silverlight, the most straightforward is probably by handling the selection event and changing the image source.

Ok, so I have it working... somewhat..

I have it setup to where when ever those options in the listbox are focused it will change the image source. BUT NOW I have a different problem.

How can I tell the listbox which source brought the listbox open so when i select an option it changes the image in that source.

SO basically I have image1 image2 and image3. Right now when you click on image1 it opens the listbox and will do the same for image2 and image3 BUT I cant figure out how to make the listbox understand which image I clicked on so when i select an option it will change the image in the right spot.. I know I can just duplicate my code because I have it working and make all new events but I feel like there is a shorter way.

Sorry to ask help for simple tasks but im learning and having a hard time really finding info on this. Everything is really just explaining the functions of the code but not really explaining how to do things with the code if that makes sense.