I had a similar problem last week couldnt find something in any of the books. When i asked my leader about alcohol points she said that we cant work them out ourselves because its a complex way alcohol is included in the calculation but most of the main drinks had beeen done in the shop guide. So when i said what about drinks not in there she said the best thing to do was to find the most similar drink to the one you're having and use the points value for that. Its not ideal but until they have all the alcoholic drink points worked out is the best you can do. Id say a whisky/bourbon is 2 points so that would be pretty close to what southern comfort is. Hope that helps.