Make sure to install them in ascending order (from lowest number [1] to highest [8]).

It is also important to choose only one (1) optional from inside each folder (#_VVF_Name). Otherwise, they will overwrite each other causing one of them to not work. Applicable to folders 1-4.

Unless they're followed by another number (#_#_VVF_Name), then you can install more than one. Applicable to folders 5-7.