Netbackup immediate job initiation using commands

I have following requirement in Windows2008 R2 - Netbakup 7.5 , tried many ways to convince the client for other plans but below requirement I need to implement

1. Stop the application
2. Take application folder to disk level backups on the same server – Z:\Backup
3. Start application
4. Take files in the Z:\Backup to tape from media server

I am following below process

1. Create a policy with automatic schedules for disk backup for step2 in above requirement
2. Create a policy with schedule and without backup window for tape backup for step4 in above requirement
3. Add the command to stop the application in bpstart_notify.bat and copy the file into bin directory in client
4. Add the commands to bpend_notify.bat

1. Command for application start
2. Cd\program files\veritas\netbackup\bin
3. bpbackup -i -p <policy_name> -s <schedule_name>

I have tested it it is working fine for now.

Please let me know if anything wrong in the above process or in future any problem i will face? and also any prerequisite I need to take before implementing it.