I’ve spent 20 mins of my life for this, so I will link it here.
Please don’t attack the subtopic commenter, the guy really doesn’t how how this stuff work, I just felt that this time I could elaborate a process.
Some of you probably also would be surprised, why one repack of 1 GB installs in 30 seconds, and another one of the same size installs in 10 minutes. My comment on CW answers that too.