General ⇒ Presentation with latex, changing the width in each frame

[amiruw]

Hello,

In my presentation, I use "\usetheme{Warsaw}" and in order to increase the usable space in each frame, I use "\useoutertheme{infolines}". In this way, the bar at the bottom of each page is equally divided between author's name, title, and date and slide number. Is there anyway to change the width of each section? For example, I need more space for the title compared to author's name or date. Any comment is highly appreciated. Also, the code I am using is the following:

\usepackage{beamerthemesplit}

\usetheme{Warsaw}
\useoutertheme{infolines}

\title[...]{...}
\author[...]{...}
\institute{...}
\date{...}

\begin{document}

\begin{frame}
\titlepage
\end{frame}

Thank you.