Here is a thing about Fonts. Especially Tamil fonts which I myself could not read and understand. Anyhow, I face with a user who is not able to read the tamil fonts from Ms Word from their PM.
Here's what I know. Usually there will be Tamil software (Eg. Azhagi) but anyhow I myself could not understand how to use it. The simple method to actually deal with Tamil Fonts is knowing what Fonts the PM is using. In this case, the PM is using New Kannan Text.
So for the research staff, they need only get this Kannan Text and installed it in their PC under Control Panel>Fonts. Just copy and paste the download Kannan Text from the Internet to the Fonts and it prompt to install.
Open the Ms Word and it will automatically show the text. Well, it do save a lot of time rather than learning how to use the third party software.
You can get the New Kannan Text at
http://fonts.webtoolhub.com/font-n21795-new-kannan-text.aspx.