Hi Colin,
I have attached the SSM installation guide https://www.dropbox.com/s/r66ecejfyhp7vkq/SSM%20Installation%20Guide.pdf that mentioned NW7.3 SP01 or higher in page 15
"The application can be installed on SAP NetWeaver AS Java 7.30 SP01 min. You can decide which capabilities you want to configure."
if not possible I have to download NW 7.3 SP01
Regards