That said, there is no real difference between downloading it here or there. It is still a gigantic file.
This said, for those only interested in the locomotives, I recently released a package containing only the three GP40-2s, three SD40-2s, and two RP-E4D's from the original Megapack. This package already has the shape update applied to them.
Should be right under the new GP40 + RP-E4D v2.0 set.
"Because you're cool, Kurt." "So is my refrigerator."