How to upgrade RAM memory in Lenovo ThinkPad R61 laptop - YouTube
IBM Thinkpad T61 RAM Replacement - iFixit Repair Guide
OFFTEK 256MB Replacement Memory RAM Upgrade for IBM-Lenovo ThinkPad R61 (8934-xxx) (DDR2-5300) Laptop Memory at Amazon.com
Tutorial: How to upgrade ram in a T61 Thinkpad - YouTube
How to upgrade RAM memory in Lenovo ThinkPad R61 laptop - YouTube
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