The video above shows how to install The Sims 4 Tiny Living All in One, but the procedure to install other versions of Sim Architect's Sims 4 All in One repacks is the same or very similar.
This version of The Sims 4 Island Living 1.52.100.1020 is portable and it also works offline, so you can download it once and play with it right away without actually installing anything (you just need Windows & Visual C Runtime Libraries previously set up)!