I managed to brick my Thinkpad T60 while experimenting with Coreboot, so I had to completely extract the main board to get at the boot ROM. I was pleased to notice that I could easily cut out a small piece of the inner chassis to allow me to de-brick the laptop again without taking it completely apart again. Here are some pictures of the laptop with the keyboard and wrist rest off showing how easily I can get at the ROM now.
https://www.flickr.com/photos/32548582@N02/albums/72157668418115386
If it's not already obvious, surgery like this should only be performed when all boards have been removed from the inner chassis.