From B9 and above Version Application P986130 can be use to change the status of Job Queue for all type of Enterprise server that is irrespect to AS400 or NT.
I don't know if this will help with what you are looking to do, but you can submit the jobs to a job queue that does not exist. This way, the jobs will never process. Then, when you are ready to release the jobs, just use SQL to change the job queue name to a real job queue.