U can download prayers time gadget from Microsoft website or by searching on the web. Its automatically updates times of any city of any country.
For Azan times
Download Azan Times 1.0 - This Vista gadget will show the Azan prayer times for your location on your desktop - Softpedia
For Prayers Times
Download Prayer Times Vista Gadget 2.3.2.0 - Vista gadget that will add a prayer clock on your desktop so that you may never forget your prayers - Softpedia
The above looks like same but their function are slighlity different.
:k: