LaTeX forum ⇒ Theses, Books, Title pages ⇒ Proper way to make frontmatter and backmatter chapters with Legrand Orange

[AntonVargas]

I'm working on a book using the Legrand Orange Book template, and I need to figure out the best way to make chapters in the frontmatter and backmatter. Standard chapters are based on the following elements:

\chapterimage{myimage.jpg}
\chapter[Short title]{Long Chapter Title}
\label{ch:raisingPets}

But for various reasons involving titles, the TOC, numbering, etc., that's not suitable for frontmatter or backmatter. For these, I've found a bunch of things floating around on forums, which include the following:

\chapterimage{myimage.jpg}
\chapter*[Short title]{Long Chapter Title}

\label{ch:raisingPets}

\cleardoublepage

\phantomsection

\setlength{\columnsep}{0.75cm}

\addcontentsline{toc}{chapter}{\textcolor{ocre}{Short title}}

I imagine the answer is some combination of the above, but since I'm not very experienced with LaTeX, I simply can't figure this out.

In short: What code should be used to create a frontmatter or backmatter chapter with Legrand Orange?