You're a life saver!
This thread was 3 years ago and following this advice you won't be able to put the icons properly.
Intel XDK has a new version that creates a folder for you to put the icons in outside of C2.
Export C2 to Cordova, create your icons and splash screen separately then when you try to add icons in XDk, click on any of the add icon options then XDK will create a separate folder for you to paste your icons in.