If u want to automate Massive parameters u need to click options in Massive(the little arrow on the top left) than click "Make editor thumbnail"(a folder named Massive should appear in ur browser. Click it and u'll see all the parameters listed) and than select the ones u wanna play with, right click and select either "create automation clip" or "edit events"(where u can draw shapes freely). U can also record automation by clicking the record button, selecting "automation and scores" and getting mad with the knobs.
If u r gonna do this with fruity's built in plugins, do what Fletch said - right click and create automation clip/edit events.