On the contrary, Chernobyl has been a great help to the community in more ways than one. But as for your question, there is very little to go on about what problem you are running into about installing your visor. A little context/explanation can go a long way when asking for help. If you want to attach the visor to your helmet, Chernobyl's suggestion of using hot glue is spot on. Anything hotter or any material that holds onto heat longer than hot glue would melt the plastic of the visor. If you have attached it and there are gaps between the visor and the helmet, (since not all builds are perfect) , jam some bondo inside the gap and smooth it out so that the visor and the helmet become flush with each other and seal nicely.