For those unaware, SCETool is a PS3 key crypto tool that supports a wide range of binary file types (SELF, RVK, PKG, SPP, OTHER).
To quote via Twitter: SCETool 0.2.8 (intermediate release)
Version 0.2.8 (intermediate release):
Fixed minor bugs where scetool would crash.
Added SPP parsing.
Decrypting RVK/SPP will now write header+data to file.
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I wonder what else is stored in the area and how long the data in it persists, so my next idea is to code an isolated elf, that allows me to specify the value written to channel 64 and then dumps the data from channel 73.