Enabling Windows XP and Microsoft Office for Bharatiya Scripts

To enable Bharatiya script support in Windows XP,

Go to Control panel
Click on 'Regional and language options'
Go to 'Languages' Tab
Check select 'Install Files for complex script and right-to-left languages [including Thai]'
Press OK

For Microsoft Office 2003,

Go to Start->All Programs->Microsoft Office->Microsoft Office Tools->Microsoft Office 2003 Language Settings
In 'Enabled Languages' Tab, choose 'Indic' from 'Available languages' combo.
Select all scripts you need from the list below and Press 'Add >>' button.
Press OK

In Microsoft Word