charmm problems



Hi all,
 I have a few questions on running charmm simulations.
 1) I have this protein pdb file from protein data bank.  It has a -9
 charge.  Do I need to add 9 Na+ to balance the charge?  If yes, how and
 where do I add them?
 2) After taking care of the charge and solvation, how long do I need to
 minimize the system?  Or how do I know if the system is minimized?
 3) After minimization and heating the system back to 300K, how kind of
 output files do I need to anaylsis the dyanmics?  Unformatted trj?  What
 will be the other options of output file?
 Thanks in advance for your time and help.
 Alice