You do not want to use the deployment tool distributed with Symphony to deploy your service packages. You have your own tool but want it to work with Symphony. You do not need to create a service package to use your own deployment tool.
If the service binaries are in a shared location, service binaries and any other additional files required by the service must be accessible to all compute hosts
If service executables are locally installed on compute hosts, the service executables must be in the same location on all compute hosts
Symphony grid only. The OS user account assigned to the consumer for the application must have permissions to execute the service binaries on compute hosts