hi!
u must be having the .dtsx file located either on the file system or on the SQL Server where the package is currently deployed. Then by using the VISUAL Studio 2005 you can open the specified package in the studio for modifications and the tasks that u want to do. like another OBJECT FLOW TASK and define the Source and the valid destinations.
test the same package again after modifications.
As far as deployment of the package is concerned, just deploye the same using the studio only and the execute package utility command for execution.