Hi Paul, I don't have a G-Star but a similar security video cam which is good in low light. I use a USB-stick style video capture device and then some software called VirtualDub to capture onto my laptop. RegiStax is used to stack the avi file. But there is some software specifically for the G-Star:
http://www.myastroshop.com.au/guides....htm#DOWNLOADS
Hope that helps
cheers