[XeTeX] Malayalam typesetting using XeLaTeX

[NMPOST7]

On 14/11/2013 01:12, Zdenek Wagner wrote:
>> On 14/11/2013 00:47, Zdenek Wagner wrote:
> The .tec file should be anywhere below $TEXMF/fonts/misc (it is better
> to put it into your texmf-local tree and rebuild the file name
> database) or keep it in the current directory. The .map file is not
> needed by xetex but usually both are kept in the same directory.
> 

For the time being I have kept the files in my current directory.
What do I need to do so that the command below works? Do I not need to define
the command \malayalamnumerals ?

\renewcommand{\thesection}{\malayalamnumerals{section}}


BR
suren