Is SSH the only way? Since I am unfamiliar, anyone care to give me some pointers to learn it abit?
I would suggest contacting their customer support or looking into the Knowledge Base. Both are excellent at Media Temple.
On this screenshot from the Media Temple website you can see "scheduled tasks" http://s3.mt-cdn.net/_images/screenshots/plesk_serveradmin__84a459d.jpg. That's probably the place to start. (I guess they call it that because cron is too technical.)
Review this (mt) Wiki article: http://wiki.mediatemple.net/w/%28dv%29:Cron
If you're on a (dv) 4.0, in Plesk you'll navigate to Tools & Utilities, then Scheduled Tasks. If you need more assistance, I recommend reaching out to the (mt) forums.