Lenovo Thinkpad R61 RAM-Memory (2 Gig) | Replacement Part
Lenovo ThinkPad R61i - RAM Replacement - YouTube
IBM Thinkpad T61 RAM Replacement - iFixit Repair Guide
IBM Thinkpad T61 RAM Replacement - iFixit Repair Guide
Lenovo ThinkPad T61
2GB Memory RAM Upgrade for the Lenovo Thinkpad R61 Series, T60 Series, T61 Series, X60 Series and X61 Series Laptops (DDR2-667, PC2-5300, SODIMM) at Amazon.com