How can i jailbreak....

[Barbamitsos]

... an ipod 3rd generation with 4.1 ios software installed?

[Echelong]

Google greenpoison or limera1n You can also find videos on youtube on how to do it.

[Diodge]

Look around ... the net ..google.

Just remember you can do some serious damage. If you don't know what your doing.

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Read Read Read

Once you do it. You void warranty.
200.00 + if you brick it. To fix it.

[Arterra]

google:
itouch 3gen 4.1 jailbreak