Hi guys, i got my iphone 3gs from maxis and out of the box, its os 3.1, wanna know :
1. Should i upgrade to 3.1.2 firmware through itunes and then jailbreak it using BlackRa1n? or i can straight away jailbreak in os 3.1?

2. If i download BlackRa1n RC2 means i can install ICY as well? Cause they said its unstable in RC1

3. Can i jailbreak using BlackRa1n in windows vista?

Thanks so much for the help....i am lost and would certainly need some help to be enlightened