I'm trying to use redsn0w to jailbreak my 2G iPod Touch running 2.2.1, but I can't get it to work. I open redsn0w and point it to the IPSW file on my desktop. It says "processing firmware" for a few seconds, then says "unable to recognize specified IPSW". I have both 0.7.1 and 0.8 versions of redsn0w, and they give me identical results. I have downloaded the firmware file from six different sources (including an actual Apple server), and it is always titled iPod2,1_2.2.1_5H11a_Restore. What do I do? I've searched and searched, but can't find anyone having the same problem. My only guess is that something in the filename is messing up redsn0w's process and the file needs to be renamed. Thanks for your help, folks.