I want to create USB multi partition with FAT32 for some Linux persistence and NTFS for ISO Windows install.
I do not know why grub4dos can map an ISO put on another partition while you say that
"You can move and run payload files (but not Windows Install ISOs) to other partitions or even on other drives."
ISO was map to (0xff) and chainload from (0xff) so it's not important where to put Windows Install ISO, right?
Subject E2B NTFS+FAT32