First of all you will need to download and install Active WebCam http://www.webcamxp.com
Within the http folder (which you will find in the BDLCAM folder), you will see a HTM template for each camera type.
Edit the appropriate file using notepad
Towards the bottom of the file you will see a section starting with "<applet" and ending with "</applet>". The above example is for iVista but to change for WebCamXP, just replace the section above with the following:
code="webcamXP.class" name="webcamXP" width="320"
height="240" hspace="0" vspace="0" align="top"
The only bits you will need to change are the sections shown in red