You will only be able to see name of the package in the dtsrun commands, for job steps if they were created unencrypted.

If you see something like DTSRun /~Z0xAEB6B4553DB09E5771B56FD6C06B30B37....... Then the job was created referencing a specific version of the package and the command is encrypted. What you are looking for is something like: DTSRUN /SServerName /E /NPackageName