First, make sure you have completed the mission "Guard the cemetry". Now, you should be able to go in the blocked part of the cemetry, press A in one of the first stones there.
Back from the depths of hell... Not really, just school.
Anyways, you can pretty much ignore anything on my bio/profile, as it's all extremely outdated. About 3 years to be precise. Same goes for the name, although I'm still enjoying Ratchet & Clank ;)