it was me, it's a little tricky but all is explained here
read the tutorial through a couple of times until it all starts to make sense before having a go. i made my own favicon in photoshop and then saved it as a .jpg. the tutorial tells you to store the image as a blog post, change the date of the post so it doesn't appear in your current stuff, i did mine so it is my very first post, see here
the tricky part is adding the correct code into your existing blog template in the 'edit html' page, if it doesn't work, it will be the code is in the wrong place or isn't correct. anyway, the tutorial on blogger buster explains it all, if you get stuck, let me know.