in FLV streaming, webcam 7 is supporting to stream both audio and video. the RTSP DirectShow filter is also able to retrieve both audio and video from some ip cameras so it's really a major step forward for webcamXP.
to get ip cameras using RTSP to work over internet you'll have to open and forward UDP ports 1690-1710 on your router.
if you have a webcamXP license issued less than 2 years ago then you are entitled to use webcam 7 PRO. a free single source mode and the PRO trial mode are also enabled.