Heya Spinal:
I have a first-run R6 gold (MAGICKEY6 TF V1.2), when I try to run the R6boot-2.0070-selfburn_for R6.nds as _boot_ds.nds, I get an error message stating that it cannot flash, unsupported chip type.
mcode: 89
did: C388
name: Intel C3
When I try to boot the 3.x menu (with the OLD R6 boot file), I just get a logo screen with some junk on it and it freezes (using 1GB Kingston Japanese TF card, pretty fast RW)