If you are using Vista, go to Start, Control Panel, then "Clock, Language and Region", then "Change keyboards or other input methods", under the "Keyboards and Languages" tab, click "Change Keyboards", then click "Add" under "General" tab, choose "Chinese (Taiwan)" and tick "Chinese (Traditional) – ChangJie". Then click ok.

If your language bar does not already appear on your taskbar, you need to show it. Go back to where the General tab is (under "Text Services and Input Languages"), under the "Language Bar" tab, choose "Docked in the Taskbar" or "Floating on Desktop". If you choose "Floating on Desktop", you will see the language bar appearing at the top right hand corner of your desktop. Don’t choose "Hidden".

If you are using xp, go to Start, Control Panel, click "Date, Time, Language and Regional Options", choose "Regional and Language Options", under "Languages" tab, ensure that "Install files for East Asian Languages" is checked. Then go to "Text Services and Input Languages", click "Details", and then click "Add" to install the Chinese language pack. Then click ok.

If your language bar does not already appear on the desktop, under "Preferences" (which is where you can see the previous "Add" button), click "Language Bar". Select "Show the language bar on the desktop" and click ok for all.

Then if you want to write in Chinese, just click the language bar and choose the relevant language. And you are done!

Hope this helps