Query-> iOS 4.1, 3.1.3 jailbreak

[chinu007]

Hi there,
i have 2 iPod Touchs with me. on eis a 2G MC model running on 3.1.3 and the other one is a 4G running on iOS 4.1.

1). I wanna know if Limera1n jailbreak is possible for the 4g running 4.1 and will i be able to restore it to the default firmware state i.e non-jailbroken state as warranty will get void once the device is jailbroken.
and is any specific version of itunes required to be installed prior to the jailbreak??

2). I have the 2G MC model jaibroken by spirit and it is still on 3.1.3.
Is it possible to upgrade to 4.1?? if yes can you guide me how??
and which specific version of itunes is required to jailbreak or restore cuz i am still using itunes 9.1.1 since jailbroken with spirit.

[Hpwill]

For the 4g it won't void the warnaty at all after you restore it and the 2g just update iTunes to the lates one and use greenposi0n and just update and it going to be 4.2.1 and than downgrade it to 4.1

[chinu007]

For the 4g it won't void the warnaty at all after you restore it and the 2g just update iTunes to the lates one and use greenposi0n and just update and it going to be 4.2.1 and than downgrade it to 4.1

So even if i jailbreak the 4G with limerain it it possible to restore to toriginal firmware via itunes right??
and for the 2G, i can update it normally via the latest itunes??

[Hpwill]

Yea for both