You will have to create all 22 subforms that could possibly be displayed. Mark them all as hidden. Then when the user makes a selection in the drop down, on the exit event of your dropdown your code woudl look something like this:
Make sure you set up your form as a fowed form. If the user decides to select a different name after the 1st one is displayed, then you can hide any subforms that are showing or simply make the appropriate subform visiable as well. It will be added after the last one.