I would like to have images for my UIButtons, screen background etc in my iPhone app.  

Will it work for both Retina display and normal display if I have

1. ButtonImage.png and ButtonImage@2x.png
2. Background.png and Background@2x.png

OR, should I do any extra coding so that it works for both displays?

ButtonImage.png is looking awkward on Retina Simulator. So, I should have a higher resolution image. So... please help me.

Chandu