Cant figure out how to boot Linux mint(rosa), needing help

Well, I downloaded the system/program, whatever it's called but I just simply cannot figure out how to boot it. It took approximately three/four hours to complete. I followed the step by step through a Linux wikilearning site. but I eventually ended up lost. I took a screen shot to show what I have as through Cyberlink ISO Viewer. Basically it lists this....
.disk
.boot
.Casper
.dists
.EFI
.ISOLinux
.pool
.preceed

All of these are AFTER a file.

All Im getting are each files size and type.
Any which way I attempt to open anything, nothing that I have to view works. I used a USB to download Rosa.