Adding a file header.

[Nathanael Coyle]

I’m new here, and I recently made 2 different parts in Inventor. I then converted them from .obj files to use in Part Designer, and set up their connection points. After exporting them as an LDraw file (.dat), I understand I should have a header in the file for submission to the part tracker.
What application do I use to add this header?
Also, I don’t need to add color information anywhere do I?