as far as I know you can't change the icons with home++ alone. Unless someone comes in here and corrects me, you'll prob want to download better cut to change the icons of actual apps, and or app organizer to change the icon of a group of apps (kind of like a folder).
i cant figure out how to get better cut to point to a directory other than gallery...
You can change the icons in home++ using bettercut, but only indirectly. You have to put the icons that you want to change on your stock home screen, change them with bettercut, and then you can use them on home++...it's complicated and you can't do it for all your icons (only what fits on the stock home, so, 48 icons)
thank you for this zip file. Props to you for contributing to the community...