Well, I'd like to clarify a few things - as stated previously, it's a "custom" dynamic theme more than anything.
Specifically, it can be re-created with SDK tools, using "p3tcompiler.exe" to generate the PS3 theme, and for the "loadme.fu" - it's actually a RAF file.
I doubt that Her Majesty's Royal Air Force is going to swoop out of the sky on this one however. Namely it's a Sony file - a "Rich Appearance Format" file made with SDK tools as well such as "raf_compiler.exe" - which will generate a RAF file once passed a properly created XML file.
Of note however the RAF file should have not been able to be loaded from dev_usb, it should have been loaded from app_home. In a development environment, app_home is a development PC hooked up to a PS3 Development Kit (TEST or TOOL).
anim_debug Path to the RAF file directly under app_home
I can confirm it's working on CECHC 60GB FW 3.15. Its a shame SKFU released it before he and the other pros found a way to open the system to homebrew with it (if thats even possible). Then the slims would get hacked too! Still, very nice find.
i think he did a good job by releasing it. yeah we know $ony will patch it, but if you guys are so dying for homebrews, you should simply not update. now with this exploit exposed to a lot of ppl, maybe there is a chance to open up this system.