I could've sworn that TF Lightning is a campaign from the South East in Iraq and TF Thunder is from the North at the Turkish border - at least, that's what I got from TF Narwick, that it accompanies TF Thunder.... But then, I never played "TF Thunder".... Perhaps the larger file is the enhanced version....
In any case, that helps a lot, thanks. There are plenty of good campaigns to download out there in addition to the stock.
I still seem to have Yakima....