Massive Macro Automation in Cubase 5

I am attempting to automate the macro controls 1-8 in massive. I have seen other posts where it was suggested to run a VST instrument with a midi track, which I did. I have the first automation track with MACRO1 enabled, but I cannot figure out how to change to the other macros or return to MACRO1 once it has been reassigned. It was suggested on other topics to use the generic remote function, however my midi keyboard does not have a fader or any other controls that I know of. Is there still a way to make those controls available? Thanks!