Looks like 3615xs, 1.03b and 6.2 is all it can do.
Though I am using the internal USB for the bootloader. Which is kinda nice.
6.2.1 and 6.2.2 do something weird with the network card. The activity light doesn't act normally. And after restarting, is not able to reconnect. It even borks the bootloader. I end up having to flash a new boot loader to try a different .pat file. So I guess it's a network driver issue.
On 6.2, there is some time where the network activity light is blinking slowly, but after a bit of time (about 3 minutes) it begins to flash normally, and after about 4.5 minutes the setup should pop up.
Still won't shut down. Will always restart. Even with the POWERBUTTON_6.2-0002.SPK installed.