If you checked out our RedSn0w 0.9.9b1 video walkthrough, you saw for yourself how much of a drastic change the latest version is.
One of the most compelling features added to the new RedSn0w, is the ability to 'stitch' your SHSH blobs to their corresponding firmwares. This makes it so that you have a self contained means of downgrading firmware, well after it stops being signed by Apple.
Even better, is the fact that it's completely standalone, meaning you won't have to do any trickery in order to get iTunes to let you downgrade. By stitching an SHSH blob to a firmware file, iTunes is none the wiser.
Check out our full tutorial and video walkthrough of this incredibly handy new feature...