L4D models missing dx80 and dx90

Title explains all, am trying to hex multiple l4d2 models but some are missing .dx80 files and when I run ferdam’s tool to add them it just deletes the .dx90 as well

Copy VTX fire 3 times and rename the copies to .sw.vtx ,.dx90.vtx and .dx80.vtx

It should work because thats what I do when I want to decomplite L4D2 model