BejjBz wrote But im wondering what i should do now, can i transfer every file to my jtag HDD?

Look at my first reply i just edited it

Do i need to open it in WX360?
Im on a mac so i cant run that program, : / Sucks
But when i extract the file from .rar i can actully open the .ISO file without doing anything just double click it, does that help anything?

First you're going to want to extract those files into one .iso

To do this right click part 1 and click 'Extract files' Assuming you have a program such as 7Zip or WinRaR.
After it's finished extracting you should have one large .iso file.
Take this file and move it to a USB then into your xbox. Or through a transfer cable directly to your hard drive.