Normally, computers that use AMD or Intel Atom processors are unsupported by in Mac OS X. To set up iAtkos on Windows, you have to use special software like Transmac. DMG files are rather difficult to work with, since they don't work with Windows by default. Meanwhile, iAtkos is distributed as a 'DMG' file, which is a proprietary 'disk image' format made by Apple. Niresh is distributed as an 'ISO' file. The ISO format is a standard DVD image format that works on just about everything.iAtkos only works with the less common (and more expensive) dual-layer DVDs and Bluray discs, because the iAtkos installer is slightly too large to fit on a regular DVDs. However, there are a few reasons why you may want to use Niresh instead. iAtkos is the far more popular choice of the two.
If you're interested in installing Mac OS X on your PC with a distro, then you'll have two main options: Niresh, and iAtkos ML2.
If you don't have any qualms with the legal issues regarding distros, they're actually the most convenient way to set up a Hackintosh. Distros are pirated copies of Mac OS X that have been modified to work with a PC.