Garritan Personal Orchestra 4 and Jazz and Big Band 3 both come with VSTExpression maps already made and installed in the following location (default path):

PC
C:\Program Files\Garritan\Personal Orchestra 4\VSTexpression maps
C:\Program Files\Garritan\Jazz and Big Band 3\VSTexpression maps

MAC
Applications/Grritan Jazz and Big Band 3/VSTexpression maps
Applications/Grritan Personal Orchestra 4/VSTexpression maps