Sp_update_jobstep And Setting To A Particular Package?

I've used t-sql code like this to dynamically create jobs that perform specific tsql commands, including calling stored procedures



However, I'd like to create a dynamic job that runs a step that's running an SSIS package.





EXEC msdb..sp_add_job @SQLjobname

EXEC msdb..sp_add_jobserver @job_name =@SQLjobname , @server_name = @jobserver

EXEC msdb..sp_add_jobstep @job_name = @SQLjobname, @step_name = 'CPM.command'

EXEC msdb..sp_update_jobstep @job_name = @SQLjobname, @step_id = 1, @database_name = @db,@command = @commandin



I was wondering, is it possible to dynamically (in code) rather than setting the command that a job step is performing, to instruct the job step to perform a type Package? I noticed the command line setting for the step looks like this when it's a package:



/SQL "mypackage" /SERVER AMMIA01DEV04 /MAXCONCURRENT " -1 " /CHECKPOINTING OFF



However, if change the step type, the step fails. I don't see a type option on sp_update_jobstep and wonder is that subsystem?



As another option, I could instruct the job step to run the package through cmd shell but then wonder if that will run asynchronosly and if errors will be retained in the job. I'm not favoring that option.