For 1, try giving it Bullet behavior and adjusting the Gravity parameter.
For 2, I'm not sure what result you're after... Do you want the projectile to spin while it flies, or do you want the bullet's path to curve? If you set the Bullet behavior parameter Set Angle to No, then it should spin but its course will be unchanged. If you set it to Yes, changing its angle will also change its angle of motion.
Sorry for the delay (been busy as hell), but I will try the 'Gravity' advice for the 1st one.
For the 2nd, I believed I tried both of them, and neither worked. I haven't been using C2 of late, so when I load it back up I will post the results I get.