Installed on an IBM ThinkPad T60 laptop recently “upgraded” to 2GB of RAM. Catching up on updates since my retail copy is the day 1 release and does not include SP1. :
ibm lenovo thinkpad T60 memory | ibm lenovo thinkpad T60 typ… | Flickr
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) - Walmart.com
Lenovo IBM T60 SSD, RAM, and CPU Upgrade - YouTube