Looking at what I wrote on the wiki:
CPU Microcode (optional?)
Basicaly the issue is that I found that the microcode was included, trough #include and headers containig its code in coreboot, What that means is that even if you select to use no microcode in make menuconfig, it will still be included and run.
What is unclear and must be tested is if the computer would boot or have some issues without the microcode. It really has to be tested... It might also work only on a subset of the X60/T60.
Would you like to try that? I'm willing to help if it's somehow possible with QEMU (and without proprietary programs). What instructions should be used? Could you provide a step-by-step guide?