:-O
No pack it yourself hun, pack it up good and proper because parcelforce will literally chuck it off and onto their vans. Cover it in something, anything, an old box stuffed with scrunched up newspapers, masacre an old shoe box and re tape it around the ps3 with some sort of padding inside.
Trust me, if you want it to arrive in one piece you need to do this.
Have you taken out insurance too given it's an expensive item? If you haven't, I would recommend doing it, and make sure you tell your cousin to sign for it as 'unchecked'. If it gets to its destination and it's signed for in good condition, you won't have a leg to stand on.