According to Microsoft, the cause of your stop error is; "This problem occurs because the ISA Enable and VGA Enable bridge control registers may become incorrectly set. Therefore, the boot controller may not be assigned the correct PCI resources. If the boot controller is not assigned the correct PCI resources during the startup process, the hard disk from which Windows starts becomes inaccessible. Therefore, you experience the Stop error that is mentioned in the "Symptoms" section."
You might try removing both the SSD and HDD from the T60, and take the USB drive out of it's enclosure, and install it in the HDD bay of the T60. Now try installing Windows and see what happens.
It's just a shot in the dark, but my guess is that the hard drive you now have installed has developed a fault of some sort, that is confusing the BIOS...maybe.