i use the "report" Document class.
attached an example file for report. \frontmatter starts the roman counting and \mainmatter the default counting.
put the preamble into your doc.
Herbert
#LyX 1.3 created this file. For more info see http://www.lyx.org/ \lyxformat 221 \textclass report \begin_preamble \makeatletter [EMAIL PROTECTED] [EMAIL PROTECTED] \newcommand\frontmatter{% \clearpage [EMAIL PROTECTED] \pagenumbering{roman}} \newcommand\mainmatter{% \cleardoublepage [EMAIL PROTECTED] \pagenumbering{arabic}} \newcommand\backmatter{% [EMAIL PROTECTED] \cleardoublepage \else \clearpage \fi [EMAIL PROTECTED] \makeatother \end_preamble \language ngerman \inputencoding latin1 \fontscheme default \graphics default \paperfontsize 10 \spacing single \papersize Default \paperpackage a4 \use_geometry 0 \use_amsmath 0 \use_natbib 0 \use_numerical_citations 0 \paperorientation portrait \paperwidth 17cm \paperheight 22cm \leftmargin 1.2cm \topmargin 1.4cm \rightmargin 1.7cm \bottommargin 1.4cm \headsep 1cm \secnumdepth 4 \tocdepth 4 \paragraph_separation indent \defskip medskip \quotes_language german \quotes_times 2 \papercolumns 1 \papersides 2 \paperpagestyle default
\layout Title
blah blah
\layout Author
Herbert Vo�
\layout Abstract
text text ldsgfj sdfgl sd gfs text text ldsgfj sdfgl sd gfs text text ldsgfj
sdfgl sd gfs text text ldsgfj sdfgl sd gfs text text ldsgfj sdfgl sd gfs
text text ldsgfj sdfgl sd gfs text text ldsgfj sdfgl sd gfs text text ldsgfj
sdfgl sd gfs text text ldsgfj sdfgl sd gfs text text ldsgfj sdfgl sd gfs
text text ldsgfj sdfgl sd gfs text text ldsgfj sdfgl sd gfs text text ldsgfj
sdfgl sd gfs text text ldsgfj sdfgl sd gfs text text ldsgfj sdfgl sd gfs
text text ldsgfj sdfgl sd gfs text text ldsgfj sdfgl sd gfs
\layout Standard
\begin_inset ERT
status Collapsed
\layout Standard
\backslash
frontmatter
\end_inset
\begin_inset LatexCommand \tableofcontents{}
\end_inset
\layout Standard
\begin_inset ERT
status Collapsed
\layout Standard
\backslash
mainmatter
\end_inset
\layout Chapter
blah
\layout Standard
blah
\layout Section
blub
\layout Standard
blub
\the_end
