Square boots pda

Klondike iPod game question? - .tga ipod klondike

I have an iPod of the 3rd Generation and play Klondike says:

"You can get your own motif on the back of the card used. Put pictures in TGA format Klondike synchronize directory on your computer (games for the iPod in the iTunes folder), then using iTunes. The images must be 39x54 pixels.

So ..... What should I do? I do not understand.