@Fireye: The extra logging is pushed to the system log

.
Either dump it (;dm in the homescreen's searchbar), or look it up over shell (showlog). Look for linkss/libkh/cover prefixes.
You most likely either don't have Python installed, or are reading KFX books (in which case, use the snapshot version).
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@jadedpony: You only mention installing Python in your messages, that's obviously not enough

. You kind of need the hack itself (linkss)

.
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@thekha: You kind of answered your own question there

. The images *need* to exactly match the required size/format constraints, or shit happens.
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@Stiehler: Familiarize yourself with how things work around here (i.e. check out the "where to start" pinned thread, as well as the FGA and the wiki. Once you've done that, if you still have any question, come back with a *precise* query so that we may better be able to help you.