It's been a while since this thread started, but anyway.
Here is how I handle RTF documentation, now at least, after going through several options:
I use the RTF document generation option "Heading Style" and set to "Max 9 levels, elements are package +1". I then set the checkbox "Skip root package" since almost always my root package is a view which encompasses the document that I will produce from the model, say an SRS View.
I then use the "Format Bullets and Numbering" menu in my master Word document that I make a master for the generated RTF document, which in turn becomes a subdocument. Using the "Customize" option, I map the individual levels to standard headers "Heading1" etc. Any other formatting requirements should indeed be covered by RTF options inside the RTF style template.
If you have a structure that does not have separate documents reflected as separate views in your package, then of course you will need to also document the root packages. In that case do not activate the "Skip root package" option, instead map Level 1 to "Heading 2", Level 2 to "Heading 3", etc., since this is what you RTF report will generate.
It may be a bir complex, but it works fine.
Levent Mollamustafaoglu