Need Some Installation Help

[Carbide]

I would recommend creating one though instead of going and just downloading it side by side

I created a tutorial here on how to shrink a hard drive volume. Then on install you can create the Linux partition for Mint and format it to ext4.

If he doesn't like Linux, he won't be able to merge the the amount of hard drive space he shrinked with the original partition unless he reformats everything. And from my experience many people don't stick to Linux.

That was why I suggested side by side installation as an option to try to see if linux is for him.