Alright the easiest way to do it without using wifi on the ipod is to search "ziPhone" on google. Then download the program ZiPhone. Run it, make sure you have net framework 2.0 or ziPhone won't run. Then plug in your iPod, and choose the option jailbreak. Your iPod will reboot, and a bunch of kernel will appear. This is 100% normal. Once the iPod is rebooted, installer will be on your springboard.