Unity 3 scales my iPhone/iPad icons to nonstandard sizes

When I import the icons for my iPhone/iPad apps into U3, it scales them from the correct sizes (114x114, 72x72, 57x57) that I created them at to 128x128, 64x64, 64x64 (respectively). I know if I set each texture to Advanced and disable Non Power of 2, it corrects the problem. Is there an easy way to prevent this from occurring in the first place (make an import 'preset' for icons)? If I make an asset bundle with the icon textures set to Non power of 2, will that setting be carried over when I import the asset bundle into new projects, or am I stuck manually changing this each time I start a new project?