1. VERY IMPORTANT: Please update you Windows XP SP2 with the following patch: 
http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=a1decd8d-f955-4767-b372-d30dd6ad3194
Note: Without this patch, if the webcam is opened by some program and 
is to be opened by Explorer in "My Computer", Windows XP will crash.

2. For some application, e.g. Yahoo! Messenger, a VCM JPEG decompressor is needed to use 
Webcam. If there hasn't any such compressor installed on the PC, this product can be 
installed to provide the basic functionality. 
To install the decompressor, please use Explore and go to the folder where mtkjpeg.inf 
and mtkjpeg.dll are, right click with mouse on mtkjpeg.inf and select "Install".

