Any pros and cons between the two?  
Currently we have a security setup by limiting what groups have access to the packages via Cognos Connection.  The packages in the FM have no security at all b/c they were published before any security was applied. ???  Is this going to be a problem?  
Could I somehow make a copy of the existing packages and then set security and publish and delete the old package?  Or am I ok w/ just having package security set via access permissions w/in CC?
			
			
			
				I do this the same way as you.  I find it easier to update the object security in Cognos Connection than to go to FM and need to republish to update security.  I know of no negatives to this way.