I had the same problem. My partner lost the CD but I managed to find the instruction book. It mentions the name of a file named
usbpccamplus_v5.21.1.000.exe to open when you look in the CD
I did a search and downloaded it from the following address
http://www.trekethiopia.co.uk/
When I connected the PC cam, a Wizard appears and asks you to run this file from the CD or from another location. I had already downloaded to my desktop. It worked fine for me.