Multi USB wim or iso

Hi. How run many files WIM from USB? Can you recommend a functional program to create WinPE multiusb?

I tried different programs to boot ISO. There are two versions.

1.loading iso into memory and then start (does not work - on end progress bar waiting, waiting, waiting,.. no reaction).

2.loading iso from usb directly but ended error message, iso file is not continually. The files are 600-900MB.

Thanks