Sunil,
In order to us custom Fonts on the server you will need to make changes to " fontalias.xml " file
location
\SAP BusinessObjects\SAP BusinessObjects Enterprise XI 4.0\win32_x86\fonts\
The process to add the custom Fonts is the same as BI4, see step-by-step document.
How to Add FONTS to BI 4x Platform & WebI Rich-client
Regards,
Ajay