Subdued test subject "M" last night and implanted memory modification chip. Loaded mundane pre-written memories of Mexican food, Guitar Hero, and T2. Subject response was normal following the procedure, and he appears to suspect nothing. Released subject back into environment. Will re-capture subject tonight for testing. If memory implant continues to hold then will proceed with phase 2 neural pattern modifications. If implanted memories show signs of deterioration or discontinuity then subject will be terminated.