\documentclass[a4paper, titlepage, oneside]{report}

\newcommand{\COLORSTYLE}[1]{\newcommand{\Colorstyle}{#1}}
\COLORSTYLE{@COLORSTYLE}

\newcommand{\DRAFT}[1]{\newcommand{\Draft}{#1}}
\DRAFT{@DRAFT}

\newcommand{\FONT}[1]{\newcommand{\Font}{#1}}
\FONT{@FONT}

\usepackage{OSPSuite}

%set values for placeholder variables
\AUTHOR{@AUTHOR}
\TITLE{@TITLE}
\SUBTITLE{@SUBTITLE}
\KEYWORDS{@KEYWORDS}
\CONTENTFILE{@CONTENTFILE}
%technical information
\SOFTWARE{@SOFTWARE}
\SOFTWAREVERSION{@SOFTWAREVERSION}
\PLATFORM{@PLATFORM}

\title{\Title\\\SubTitle}
\author{\Author}

\PDFSettings

\StandardPageSetup

\begin{document}
\TitlePage

\TableOfContentsPages

\include{\ContentFile}

%\TechnicalInformation

\end{document}