Is there an easy way to add alternative art for a card?

I apologize if this question has already been asked before, but I couldn't find it in my search...
In the folder CardArtManaLink, you can see cards with multiple versions -- for example,three versions of the Serra Angel.
Serra Angel.jpg, Serra Angel (1).jpg, and Serra Angel (2).jpg.
Now let's suppose I want to make another version of Serra Angel, and call it Serra Angel (3).jpg. I already know how to resize the image to 288 x 232 pixels.
But how do I tell the game to consider using the fourth version? Is this process relatively easy? Or would it involve recompiling the whole game?
Thanks in advance.
In the folder CardArtManaLink, you can see cards with multiple versions -- for example,three versions of the Serra Angel.
Serra Angel.jpg, Serra Angel (1).jpg, and Serra Angel (2).jpg.
Now let's suppose I want to make another version of Serra Angel, and call it Serra Angel (3).jpg. I already know how to resize the image to 288 x 232 pixels.
But how do I tell the game to consider using the fourth version? Is this process relatively easy? Or would it involve recompiling the whole game?
Thanks in advance.