\documentclass[10pt]{{article}}

\usepackage[T1]{{fontenc}}
\usepackage[utf8]{{inputenc}}
\usepackage{{enumitem}}
\usepackage{{import}}
\usepackage{{xltxtra,fontspec,xunicode}}
\usepackage[absolute]{{textpos}}
\usepackage[papersize={{{width}{unit}, {height}{unit}}}]{{geometry}}
\usepackage{{nopageno}}

\TPGrid[0.5in, 0.25in]{{23}}{{24}}
\parindent=0pt
\parskip=12pt
%\setromanfont[Numbers=Uppercase]{{Didot}}
%\defaultfontfeatures{{Scale=MatchLowercase}}

\begin{{document}}

\begin{{textblock}}{{23}} (0, 1)
\center\huge PREFACE
\end{{textblock}}

\begin{{textblock}}{{9}} (2, 3)
    \subimport{{../assets/performance-notes}}{{}}   
\end{{textblock}}

\begin{{textblock}}{{9}} (12, 3)
    \subimport{{../assets/instrumentation}}{{}}
\end{{textblock}}

\end{{document}}
