I need some help with this one. I've got a 2G MC Model that I accidentally upgraded to 4.1 a few months ago and couldn't downgrade. I've tried to jailbreak it a few times but it didn't work.
MC models can be very tricky. Try greenpoison on another computer if you can. Redsn0w may be able to but you may need an older version like 0.9.5, not too sure. Or maybe make a custom firmware with pwnage tool or sn0wbreeze. Like I said MC model 2G iTouch can be tricky.