This question has been asked by many users so here is the answer. Just follow the below steps.
- Download all from any host (part1, part2, etc)
- Put them into one folder
- Just extract the part1.rar with Winrar
- Wait until extraction is finished
- After extarction you get the file (XCI/NSP/NSZ)
- Install the it via Tinfoil, DBI, or any preffered installer.
- Have fun
Note:- you dont need to extract every part just part1.rar is the main file which extract the data from the other parts.