Has anyone Jailbroke a 3GS Old Bootrom on 5.0.1 with Redsn0w 0.9.9b8?

Do you just select the 5.0 firmware ipsw in Redsn0w instead of 5.0.1?

Is it still an untethered Jailbreak on 3GS Old Bootrom?

Any issuses for anyone who has done this and how is your battery life?

Thanks