How Do I Install Matchcad 7,8,9, or 10

Hello I am trying to install mathcad for a company that I work for. The provided license only works for mathcad up to version 10 and the current express installation manager only allows me to install mathcad 11. I have installed 11 and tried the license and it does not work. I have found multiple community posts on how to install these version but they all use the same express installation method and it just seems to pull the then current available version. How do I specify the installation version?