If you're talking about WinPEPackages.txt, it is well explained in the mentioned thread. With such TBWinPE builder functionality you can add something like this WinPE Optional Components (OC) Reference
Thanks for the info. tboflhelper64.sys is the missing file. If you have.. imagew64.exe ifw.ini tboflhelper64.sys You will get an @ file. Edit... I gather it didn't work for you.
I tried that one too, it didn't work for me. Perhaps I didn't test such configuration correctly. Anyway I'm sticking to TBWinPE, it's superior in some ways.