Well I have to downgrade my ipod inorder to Jailbreak it.. and I cant find any decent guide on how to do it so yea.
DO you know what gen it is? i.e 1g,2g,3g
if it's 3rd gen downgrading only works for 8gb. not 16gb or 32gb
and what firmware it's running?
i'm guessing 3.1.3 if you have to downgrade like i did.
once you know what gen you have go and find your gens firmware thats 3.1.2
Make sure your iod is plugged into your computer.
download it and once it's done put your ipod into DFU mode.
Hold the home key and the power button for 10 seconds. Then let go of the power button but keep holding the home key.
if you did it right you should hear a connection sound on your computer.
itunes should pop up and say your ipod id in recovery mode. to use this ipod please restore the firmware.
hold SHIFT and click restore. find the firmware file you downloaded and open it. your ipod should then start to downgrade. it takes a few minutes.