Hi Harry,
The CBQ versions saw substantial modifications by Dan V. and Mike C., chances are that some files are named differently now. Generally, for all my EMDs, "main1" is for radiator/dynamic grilles, hood and cab sides, "main2" is roof, cab front, trucks, pilots, frame sides, fuel tank. The smaller parts are almost all on the "clutter" texture. And I'm painfully aware that lining up stripes over the cab and body can be a real pain because the mapped areas of hood and cab sides aren't of identical sizes.
The dynamic brake blister is to the right of the short hood on the main1 texture (probably not included in the .psd's Legend). I'd recommend converting one of my dynamics-equipped SD's main1 texture with RW Tools for the original artwork (and its exact location on the texture).
Cheers,
Michael