By the way, i would like to ask, if its practical to register all flying courses(CPL,IR,Multi) on TSA all at once?
If you have reviewed the AFSP website on how to register with the TSA, you may have noticed the comment:
Final Approval Granted: The Candidate has been granted final approval for the training request.
Training must commence within 180 days of approval and finish within 365 days of approval.
So unless you are confident that you will start and complete each course within the stipulated window, you should apply for each course as and when you expect to start.