Yes, I used the firstname.lastname@example.org. You just need to run the exe file to to do the upgrade. My system reboot itself after finished the upgrade.
I don't know if US05 supports bitsetting or not as I have not try this.
On my drive the burn quality for US05 is poorer than GS0A but similar to GS0C. However, the US05 of 812s support more media at their certifiied speed than both 851 fw.