I have downloaded the updated DLC for IW4x and it includes all DLC and not just the new maps.
I have stripped out all that you don't need and zipped it up and uploaded it to wetransfer.com
The file is now 655Mb and not 2.6Gb
https://we.tl/t-oLALNCMjiU
Extract the contents and copy the file from the main folder into your IW4x main folder
Copy the files from the zone/dlc folder to you zone/dlc folder and you are done
Cheers
MAD_DAD aka BOTs-of-WaW