Well, thanks Jim! I've tried all the 6 possibilities, including two of them together... but no results.
Actually, the device didn't turned on when the pins were shortened! I've isolated the other pins to protect the chip so I could work better, take a look:
But I think I'm gonna try again another time... with a little help from a friend... another question:
The device was working fine before I've made the procedure described
here by
sableroku but I could connect it to WindowsXP, so I decided to try that upgrade. But when I got that blue "usb drive" screen I still could connect it (0000 device id) to XP. So, is there a way to avoid that blue screen when I turn it on? The reset button seems to do just nothing!!!