Update docs (mostly), fixes, etc

docs/parts/usage.tex

@@ -5,9 +5,7 @@ You can type \texttt{latex-prepare} and press tab, if you have installed the VSC
 \begin{minted}{latex}
 \documentclass{article}
 
-\newcommand{\dir}{~/path/to/helper} % TODO: Change your path here! No trailing slashes!
-\input{\dir/include.tex}
-\load{recommended} % TODO: Change the inclusion level (if necessary), see below
+\input{~/path/to/helpers/janishutz-helpers.tex} % TODO: Change your path here
 
 \setup{Type your title here}
 
@@ -19,30 +17,26 @@ Type your \LaTeX here
 \end{document}
 \end{minted}
 
-The \verb|\load| command takes one parameter, which can be one of the following:
-\begin{itemize}
-    \item \texttt{minimal} Just the core styling and core functionality.
-    \item \texttt{most} Includes Math, CS, Language and all styling.
-    \item \texttt{recommended} The recommended setup. Includes BibTeX in addition to what is in most
-    \item \texttt{all} If you want to also include glossaries or code with highlighting
-    \item \texttt{letter} If you want to typeset a letter (see \ref{sec:letters})
-\end{itemize}
 
 \subsection{Configuration}
-You can set a global config in config file in helper files directory. The file is located at
+You can set a global config in the config files in the helper files directory. They are located at
+
+\texttt{/<path to helpers>/config/}.
+All config options are documented there.
+After changing them, run \texttt{build.sh} in the main directory.
+
+Each of the options can also be overridden directly on a per-document
+(see \ref{sec:perFileConf}) basis using
+\mint{latex}|\renewcommand{\<command>}{<value>}|
 
-\texttt{/<path to helpers>/config/config.tex}. All configs are documented there. Simply open that file using any text editor and edit your config.
 
 \subsection{Letters}
-\label{sec:letters}
 Letters require a different setup compared to a normal \LaTeX document:
 
 \begin{minted}{latex}
 \documentclass[12pt,a4paper]{scrlttr2}
 
-\newcommand{\dir}{~/path/to/helper} % TODO: Change your path here! No trailing slashes!
-\input{\dir/include.tex}
-\load{letter}
+\input{~/path/to/helper/letter.tex} % TODO: Change your path here
 
 \setkomavar{subject}{} % type your subject here
 \begin{document}\raggedright