Hi papperboy3498 ... you can use Powershell which is built into Windows 10 now.
You have to do this using Powershell in elevation mode.
So right click your start button and click Windows Powershell (Admin)
The command is makewinpemedia
See link on how to use it.
Bascially you create a folder on your C drive with all the files you want to put in an ISO. The another folder to where you want to save the iso.
Then go to pwershell and run the following command.
MakeWinPEMedia /ISO C:\yourfolder C:\FolderToSave\nameofiso.iso