@Flyman : No one tested the serial access/ID7v2 at 74.00.200 so far. As it is a newer version than 70.00.367, which also blocks everything, I guess that you can not use the ID7v2 process to enable the installation of AIO tweaks via USB. Time will show, if there will be a solution for 74.00.200. But as this firmware is not available in the wild for testing so far, it is somehow impossible to test so far. ID7v2 only works for 70.00.335 and 70.00.352 as far as I know.