By [RO]man, this is a tool for unpacking the PS3 update package 1.10 available for download from jp.playstation.com/ps3/update/
Quick & dirty, src included, BIG endian structures/files, only for devs, etc...
SCE format is now interesting; we've seen it mentioned in PSP loader, haven't we? ... and the semi-encrypted ELF
char magic; //"SCE\0"
int version; //? = 2
short encrypted;//? = 1 not; 0 encrypted
short unk; // = 1
data.... your input here