1.Download and Extract DpFileListGenerator v1.6 by Baris
2.Run the tool as Admin and change the Cpk path to the destination of your custom Cpk ( I use desktop )...Change DpFileList path to where you want the newly generated DpFileList.bin to be saved ( again i use desktop ).
3.In DLC drop box choose DLC v1.0..make sure your Cpk is checked & then Generate.
4.Place your custom Cpk & DpFileList.bin in C:\Program Files (x86)\Steam\steamapps\common\Pro Evolution Soccer 2017\download.
Credit : Baris, Hawke