I am having the same issue that Lukey have. I have followed the post linked but has not yet been succesfull. I want to have a custom photo, and I can see that inside de Linkss-folder things are happening. I still get the default Kindle-photo though...
I have now first installed the jailbreak and the hack in 5.3.1 and later in 5.3.3(along with rescuepack etc)
Why doesnt it work?