I figured which chip goes where. I combined the 2 binary files and disassembled the result. I tried a disassembly of the swapped file but it was obviously not good so I scrapped it. I added the files in this project.

Command to combine the 2 binary files:

srec_cat -o BOOT.bin -binary BOOTODD -binary -unsplit 2 0 BOOTEVEN -binary -unsplit 2 1 

 Location of boot chips:

D8-15: BOOTEVEN

U7 on BBTC, U21 on TC

D0-7: BOOTODD

U8 on BBTC, U22 on TC

The listing in the original article seems to be an old version. The 2 files on the software disk are a derivative.