Character morphs can be in any format, either executable or compressed.  Executables from DAZ will follow a similar install format, however, once you establish an installation pathway, it gets easier to add content to your runtime or external runtime. 

Compressed files can offer a different challenge if the vendor does not conform to hierarchal runtime standards to easily migrate your content into the right locations.  Purchased content shouldn't be a problem, but freebie packaging can be rather unintentionally careless and poorly assembled.