Hi,
I have some simple questions to ask. But i couldn't able to find a solutions. My questions are,
- How can i change the name of a workflow.

- How can i hide a unnecessary workflow definition from the workflow list.

- How can i customize the form of a workflow.

- How can i make the email notification check box as checked by default in the workflow form.

I found some posts for these questions but, I couldn't find which files to edit. Please help me.
Thank You.