You cannot put themes on an iPod Touch without the jailbreak.
Steps1 Do a back-up from your iPod. Before you jailbreak your iPod, be sure to sync with iTunes to back your iPod up. This is just in case anything goes wrong.
Yes, you can undo the jailbreak. You have to restore your
It is not required, but it is recommended. You should back up your iPod before a jailbreak nevertheless...
you need 4.0.1 to jailbreak it
Hey search 'spirit jb' (jb = jailbreak) easiest (and working) 3.0 ipod touch jailbreak and you can turn ur ipod off and not have to restore everytime you turn it back on.
You will have to jailbreak your iPad/iPod/iPhone.
Not without erasing the jailbreak.
How to jailbreak my iPod touch
to jailbreak your iPod 4.1 go to greenpois0n.com
It depends on what software your ipod is running.
It is safe to jailbreak it on JailbreakMe.com But it is suggested you back up on iTunes first.