Impossible you need a computer no matter what
No. You must restore to Downgrade the Firmware!
You can't downgrade an IOS on your iPod Touch.
You can't downgrade IOS!
go on itunes and connect your ipod touch to your computer and hold shift and click upgrade
You cannot downgrade an iOS device without installing illegal hacks.
Downgrading your iPod Touch should not delete anything.
you dont
You cannot downgrade an iPod touch with with another iPod touch's shsh blobs because the shsh blob is unique to that device. Think of it as your DNA is unique nobody can be exactly like you.
You first have to download a torrent of the version of firmware you want, and then you can install it onto your iPod touch
Well it's kind of IMPOSSIBLE
No
I have never heard any way to downgrade software.