How to open MessageUI.framework to grab the images used in it

I am trying to access the Mail App's emails button (iPhone Mail App's ema开发者_Python百科ils button iPhone). Please see the comments in the link. I need to open the contents of that folder to access the image. Please. let me know how to open. All i see them are as executable files...

Check /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator<LatestVersion>.sdk/System/Library/Frameworks/MessageUI.framework/, there should be a lot of PNG files. You may need to decode those PNG images to see them on the computer.