I am using 0.6.9 of seasonpass and the latest version of ATV Black. I have even gone as far as purchasing a secondhand macbook to try and get this working....
first of all the jailbreak works ok, can reboot and continue the setup (I restored the standard ATV software so had to set up preferences). I then ran the flask which told me that the software had been installed successfully, however the ATV did not restart as mentioned in your install guide. The screen went blank for a second and then returned to the standard menu. A teathered reboot fixes this and the maintence menu is shown.
When selecting the manage extras menu this takes a while, ie 15 - 30 seconds to load. once in the menu selection is very slow at changing. I have tried to install each of the extras to no avail. even after a reboot they are not on the menu bar, any ideas?