Windows 2000 supports Devanagari, Kannada and Tamil.

Language pack for Indic scripts comes bundled with Lipikaar installer. The Lipikaar installation prompts for complex scripts installation when Lipikaar setup is run.

Complex(Indic) text support needs to be enabled manually for previous versions of Lipikaar.

• Go to Start > Settings > Control Panel > Regional Options > General Tab.
• Under Language Settings, check the box next to Indic
• Click Ok. The system may prompt you to copy the appropriate files from the Windows 2000 CD
• Insert the disc when prompted and proceed. Restart the computer after files have been copied.
• If you don't have the Windows CD, you can download the files from here.
  Extract its contents into a folder. When prompted for Windows CD, simply point to this folder using 'Browse' option of the prompt window.
• Select the Input Locales Tab
• This will show you the Add Input Locale Dialog Box.
• Click on the Add button located under Input Language Display Box.
• This will take you to Add Input Language Dialog Box.
• Repeat the above steps to add other Indian languages that you require for typing.
• Click OK to close the Regional Options panel.
• You should now see a language indicator in the System Tray (located at bottom right hand corner of the desktop by default).
• You can switch between different languages by clicking on the language bar and changing the language or by pressing the left ALT+SHIFT keys.

Detailed help with screenshots is also given here: http://www.lipikaar.com/help/indic-support-and-browser-help?tab=2#win2k-info