Hi, before I get started I'm a noob to this site and Poser so the answers may seem stupid to you who answers.  Anyways I have two questions 

1. When I am rigging a character I can do well until I get to the fingers for weighting than the selection tools get messed up (for example if I wanted to weight a finger tip I would need to select blank space in front of the finger tip and take guesses on where the selection would go) and sometimes when I make a selection it will go to the head or other hand or something and not the fingers 

2. If you were doing a action scene and had a character need to throw something late in the scene so you would need to parent it to the character but you need to unparent it so it doesn't appear to be flying in air because your character is moving is it possible to keyframe a parented object to be parented one frame and not the next 

Once again I'm a noob to the software and this site so I may be asking stupid questions.