I am surprised there isn't an Umbraco Contour field out-of-the-box that lets form editors write RichText or at least plain text instructions in-between the form fields, so that form authors can add more detailed instructions scattered throughout a form.
Does anyone know if this exists?
I found this suggestion in 2011: http://our.umbraco.org/forum/umbraco-pro/contour/22661-Place-plain-text-in-contour-form
My first attempt, I put together a custom field for Contour 3.0.21 and Umbraco 7.1.x, but I am not too keen on how the form results table now has an empty column. Instead, I would prefer that the content is placed in the form without creating a column in the result table, and also without emailing an empty field in the "Send Email" workflow email.
Have you tried taking a look at the Contour Contrib project for Contour?
http://our.umbraco.org/projects/developer-tools/contour-contrib
There is a Label fieldtype there that I believe does what you're looking for. If it does, you can get the source for that project and use that to create more field types that meet your needs. I hope that helps!