You could do something like Every tick: Set bullet Y to ObjectName.Y+100*dt, where 100 is how much (in pixels) it would move in one second. dt or timedelta just makes the move smooth.
On your second question - if you bought it the link's in your email.
Actually, it works! <img src="smileys/smiley1.gif" border="0" align="middle" /> i made the mistake of putting set y to ground.y+100*dt, instead of bullet.y+100*dt!
THANK YOU SO MUCH!
Also, kyatric, thanks for the link