The DAZ Genesis Extension Pack includes the DAZ Genesis DUF files and other developer resources in a zip file. Just unzip the contents to a convenient folder and then access them from this folder when required.

The Character Designer's Resource Pack includes an iClone content installer and a zip file.
iClone content installer contains characters, motions and props saved in iClone formats which users can directly load into iClone and access it. The pack also comes with a separate FBX source file-set.
Whereas the zip file contains FBX files, which can be imported into 3DXchange 6 and converted into iClone characters and motions. You may edit your files with other 3D tools before converting. All texture maps are embedded inside the FBX files.