\def\title#1{{\bf #1} \\[1em]}
\def\author#1{{#1} \\}
\def\tr#1{{\em Centre for Vision, Speech and Signal Processing\\ University of Surrey, Guildford, GU2 7XH, UK}\\[1em]{\bf Technical Report #1}}

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\addtolength{\vsspTmp}{\headheight}
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\addtolength{\vsspTmp}{5cm}            %5cm from top of the paper 
\vspace*{\vsspTmp}
 
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\addtolength{\vsspTmp}{-0.8cm}      %for HP printer, don't know why
\addtolength{\vsspTmp}{5cm}

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}%
{                   %end definition 
\end{center}
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\newpage
}