numeri pagina frontmatter a sinistra

Ciao stò utilizzando il pacchetto fancy e non riesco ridefinire limpaginazione fancy per spostare i numeri di pagina a sinistra mentre in front matter ci sono riuscito.
Potreste aiutarmi?
ecco il file .tex

\usepackage[T1]{fontenc}
\usepackage[latin1]{inputenc} %latin1 consente di battere direttamente le lettere accentate
\usepackage{indentfirst}
\usepackage[dvips]{graphicx}
\usepackage{amssymb}
\usepackage{amsmath,amsfonts,amssymb,amscd}
\usepackage{ednotes}
% Chapter Headers
\usepackage[Lenny]{fncychap}
%\usepackage[grey,utopia]{quotchap} %Capitolo con solo numero maiuscolo
% Formato Pagina
\usepackage{fancyhdr}
%\usepackage{syntonly}
\usepackage[hang]{subfigure}
\usepackage{amsthm}
%\usepackage{eucal}
%\usepackage{eufrak}
\usepackage{epsfig}
\usepackage{verbatim}
\usepackage{pstricks,pst-node}
%\usepackage{showkeys}
\usepackage{setspace}
\usepackage{textcomp}
%PACCHETTI TESTATI

%—————Comandi fncyhdr————–
%—————–Lenny———-
%\ChNameUpperCase
\ChNameVar{\fontsize{20}{24}\usefont{OT1}{ptm}{m}{n}\selectfont}
\ChNumVar{\fontsize{60}{72}\usefont{OT1}{ptm}{m}{n}\selectfont}
\ChTitleVar{\Huge\bfseries\rm}
\ChRuleWidth{1pt}
%\ChTitleVar{\LARGE\it\centering}
%—————–Conny———-
%\ChNameUpperCase
%\ChTitleUpperCase
%\ChNameVar{\centering\LARGE\sc\bfseries}
%\ChNumVar{\Huge}
%\ChRuleWidth{2pt}
%\ChTitleVar{\centering\Huge\rm}

%\rhead{\itshape\tiny\rightmark }
%\lhead{}
%\rhead[\fancyplain{}{\bfseries\leftmark}]{\fancyplain{}
%{\bfseries\thechapter}}
%\lhead[\fancyplain{}{\rmseries\itshape\tiny\thesection}]{\fancyplain{}
%{\rmseries\itshape\tiny\rightmark}}

%%%%%%%%%%%%%%%% Per i numeri romani minuscoli in maiuscoletto simulato
\makeatletter
\DeclareRobustCommand*{\simulatedSC}[1]{\textormath{%
\hbox{$\relax$\fontsize{\sf@size}{\f@baselineskip}\selectfont#1}%
}{%
\scriptsize\mathrm{#1}}}%
\renewcommand*{\@roman}[1]{\simulatedSC{\@Roman#1}}%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\hyphenation{VCCT elastic fracture GENOA GUI CODSTRAN ICAN MHOST mo-de-lli o-ri-gi-ne}
\sloppy

\begin{document}
\onehalfspacing
%\doublespacing
\begingroup
\pagestyle{empty}
\include{frontespizio}
\endgroup
\thispagestyle{empty}
%\newpage
%\phantom{Andrea Tomei}
%\newpage

%\include{Dedica}

%\include{Ringraziamenti}

\begingroup
\pagestyle{fancy}
\fancyhead{}
\fancyfoot{}
\lfoot{}
\fancyfoot[R]{\mdseries\thepage}
%\rfoot{}
%\cfoot{\mdseries\thepage}
\renewcommand{\chaptermark}[1]{%
\markboth{#1}{}}
\fancyhead[R]{ }
\fancyhead[L]{\mdseries\footnotesize\leftmark}
%\lfoot{}
%
%\fancyfoot[R]{\thepage}
\frontmatter
%\tableofcontents \listoffigures \listoftables

\include{Intro}
\include{sommario}
\cleardoublepage

\endgroup

%*************—Stile pagina corpo tesi—***********
\begingroup
\pagestyle{fancy}
\fancyhead{}
\fancyfoot{}
%%addtolength{\headwidth}{20pt}
%\renewcommand{\chaptermark}[1]{\markboth{\itshape\scriptsize #1 }{}}
%\renewcommand{\sectionmark}[1]{\markright{ }{}}
\renewcommand{\chaptermark}[1]{%
\markboth{#1}{}}
\fancyhead[R]{\mdseries\itshape\footnotesize\thesection }
\fancyhead[L]{\mdseries\footnotesize\leftmark}
\fancyfoot[R]{\mdseries\thepage}

\mainmatter
%\include{Cap_Genoa}
%\include{GUI}
%\cleardoublepage
%\include{Esercizio_internazionale}
%\include{Esercizio_internazionale_2}
%\cleardoublepage
%\include{cap1}
%\appendix
%\include{Appendice_file}
%\include{Appendice_SolType}
\bibliographystyle{amsplain}
\include{Bibliografia}

\endgroup
\end{document}