I've left for 2 hours, nothing happened.
This is a fresh flash drive, from Patriot. I formatted (not even selected "Fast Formatting") in FAT32 and copied the install.img only, at root.
The flash drive led light up intensely, but the usb led on PBO doesn't light on, even after 2h.
I'm going to connect it again, and run erase -m a second time. If possible I'm going to post the screen results. Thanks.