This is basically just to give easy access to different CDMA radio files, it will put it in the proper place, and you can launch loader from within it to update.
This is handy if you don't like the radio code that you're using, you can easily download and switch to whichever version listed.
How to use:
Place Swap-A-Radio.exe in your current CDMA folder and run it.
Click which radio version you would like to swap to. It will download it and backup the old one.
click Launch Loader.exe and update with your new radio file.