I have a SONY DPFV1000 (no "B") digital photo frame. I need to add a different memory chip to update the existing photos, but the screen says; "memory full" - I just added about a dozen pictures, and since I received this as a gift over 3 years ago, I no linger have the instructions. Can you please walk me through, step by step, on how to re-load the memory chip I now have? I don't know what the memory is, but I only have about 600 pictures on my chip