In this guide, the acutal laptop is Lenovo / IBM Thinkpad X61. The Lenovo Laptop Keyboard are the same, the disassembly procedure should be similar.
First of all, shut down your Thinkpad X60 / T61. Disconnect the AC adapter and remove the battery.
1. Remove four screws securing the Lenovo Laptop Keyboard on the bottom of the laptop.
2. Insert a sharp object between the bottom of the keyboard and palm rest and carefully lift up the Thinkpad X60 / T61 keyboard.
3. Lift up the keyboard a little and then detach the connector.
4. Remove the Thinkpad X60 / T61 keyboard.
Reverse the procedure to install your new Lenovo Laptop Keyboard .