How to install Sinhala for Internet Explorer? 

You need Microsoft Windows XP (licensed copy) for installing Sinhala Pack. Install Microsoft Windows XP service pack 2 if it is not already installed. If you have installed Sinhala Pack before, please uninstall it before installing again. Log-in with Administrator privileges. To install Run “Setup.exe” program. First install “Windows XP Sinhalese Enabling Pack”. Install Sinhala Kit Version 2.0 from Microimage. After installing software Restart you computer.

Download the software here.