Visable human project

Operating system: windows 10 professional
Slicer version:4.11
Expected behavior: open header
Actual behavior: cannot open header

Dear all: I wish to use the data in the Visual Human Anatomy project to do 3D rendering. I downloaded the data set. Some of them are in RGB format and some in rar format. I unzipped them with winrar but on opening them with infranview, it says they cannot find the header. Is there anyway I can correct that? thanks for your help.