You are right, when tou have SBE you can not use the DMS mode. For DMS mode to activate you must have EE server.
And then you dont have Published installed , all your applications whether they are used for reports or for ETL will be there under User Document.
There are two ways you can achieve what you want.
1. Create a separate folder for the ETL applications and then link then using the Mount Folder, and when you mount a folder you will find the button called Browsable, you uncheck this and they will not be seen to users.
2. Because you are using NTFS mode of security, your security is handled by Windows, so you can go to properties of each of the application by right click -> Properties. Here you can put your user name to whom you want to show the application on browser and remove everyone else.
Thanks for your help. Your first way helped me. Now I am finding it difficult to delete the previous task which was prior to mount folder installation as you proposed so that I can assign the new tasks with Mountfolder.
Do you know how to delete the previous task without Publisher?
Thanks in advance