Changing Default Backgrounds on 5.00 m33?

[LightShow411]

K so I put a cool XMB wave on my PSP, but it just doesn't look right unless it's on a black background. I go out and google how to change the background behind the Waves, but when I go into flash0>vsh>resource, there's no image file of any sort to replace with the bitmap all the other sites tell me to use. It seems like the logical conclusion is that the 5.XX kernel uses a different system than whatever these guys were using, as almost all the files are .rco files.

My question is if anyone knows how in the world to change the background on a psp running the 5.xx kernel, and if you do, perhaps you could walk me through how to get the color to be black, as this is ultimately my end goal.

[LightShow411]

Or the other logical conclusion would be that i didnt enable viewing of system-hidden files on my computer. Nevermind, guys