Installing Malayalam TTF fonts in Linux
Please go thru Peringodan's Linux n Malayalam blog
Also, see the related FAQ entry in Chintha.com.
If SuSe 9.0 is using XFS for font rendering, then just keeping the fonts in .font directory is sufficient (a restart of X may be required). But some applications may not be able to use XFS to render the characters.
If you are using a debian based distribution, you could use defoma to register font as described in this link.