Have the PS3 events automatically feed into your calendar, by copying this ical url into your own calendar:
PS3 Calendar: http://ps3nyc.org/news/calendars/whole_school_calenadar/feed/ical/
To add these events as a layer in your Google calendar look at the bottom of “Other Calendars” section for “Add” and then the “Add by URL” link and paste in the url. In other programs like Outlook or Mac Calendar you should look for “add subscription” or “add from internet” so it adds a new layer that updates automatically as things change instead of just importing the events as they stand now. A slightly easier way is to just put the links above in your browser. It will download a file that you can just double click on and your calendar will probably pull in the dates but then the dates won’t get updated if they change (not the end of the world).