I've set up my Star Trek mod so that one civ can't research techs normally. I've done this by adding a new XML tag in Civ4CivilizationInfos and referencing that tag in CvPlayer::canResearch. Problem is, using the tech advisor screen, you can still research techs! It seems that canResearch is only used by goody huts and the tech selection popup. What does the tech advisor use?