mal from cessnock

Hi, newbie here I'm trying to see my cctv cameras remotely. When the fellow set it up I could see my cameras via my pc when visiting friends - then I have to reformat my pc and since then I've been trying to do it myself. I can currently view my cameras from my pc at home using Video Server E on 198.168.1.100 thru port 80 but I want to see them when away, so I just dl pfconfig and am running through the process. I've accessed the modem (a thompson gateway) and am now asked what app are you trying to forward. I look for AVTech DVR but it's not on the list. Should I be selecting POP? Can you help? Mal from Cessnock AU