Also, you MIGHT (notice the emphaisis on might) be able to emulate the N64 on the Blackbox if you used pure Assembler code. But even then your going to need to add more external RAM/ROM, and O/C the Blackbox. And then your probably going to use up all cogs so there isn't enough space for the SD card SPI and FAT16 code anyways.
So as I said to Sky, i'm going to declare it impossible until further notice.
Now mods, lockify please?