Appletv 2.0 to ATV Flash 3.6.4?

Just bought an Appletv running OS 2.0, can i install ATV Flash Successfully onto my appletv, then wait for the new 3.0 OS to be sorted by ATV Flash, or just wait until the new ATV Flash is released and in the mean time update my Appletv to the latest 3.0?

Cheers :expressionless: