Under OSX for me the process is:

- Shut down 770.
- Plug 770 into computer
- Turn on 770 while holding down home key.
- "sudo ./flasher -F BETA.SU-18_2006SE_0.2006.22-21_PR_F5_MR0_ARM.bin -f -R" in terminal

(Before the last step, you need the flasher.macosx tool, "chmod -x" it to make it executable using the terminal, then, uh, rename it to flasher for convenience)

Then you type in your admin password and BAM 2006 OS