Yes you can, if you search this forum for 'diskdrive' you will find the same question many times and if you send me your emailaddress I will send you a zipfile with all the info and where to get it.
But I have a question to, someone asked me how to open a PSR550 because he is not able to yet. He removed all the screws but still.
If you know than please tell me so I can forward this to him.
Regards
Dick
Bali (Indonesia)
dick.rector.spain@googlemail.com