You can't downgrade IOS!
No. You must restore to Downgrade the Firmware!
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
go on itunes and connect your ipod touch to your computer and hold shift and click upgrade
I have never heard any way to downgrade software.
Impossible you need a computer no matter what
use your noodle!
Yes you can and there is a Cnet video about it on YouTube.