Linux Box

What is the procedure to install Linux, tell me the entire procedure for installation and the after procedure, what to do and what not to do while installing and even after installation, and what is mounting.
Here are some options for installing or trying out Linux
Option One (Full installation)
I thoroughly recommend Linux Mint 8 Main Edition [...]

I need a linux that I can just pop in an old computer and install a nintendo emulator easily on.

How about Ubuntu and install one of the many emulators from the software center?

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