Ability to customise or modify process maps to add / remove actions

I have had a number of clients asking if they can tailor the process maps to their own particular requirements. The process maps are a good way of identifying the flow of tasks, especially for new users, however as they are a fixed flow s they more often than not contain tasks that are not required or missing some actions that are required within certain organisations. The ability to remove or add tasks from the process map to create a personalised process flow would be ideal.