Do you mean multi-boot OS using one USB stake? If yes then let me tell you there are number of GUI software available over internet which figure out work easier. here are the mostly used software’s to make multiboot USB stake. WinSetupFromUSB | Multiboot USB A strongly suggested pick for introducing Windows from a USB
Top 4 GUI Software to Create MultiBoot USB | multiple Operating Systems on One USB Stick for free| Digi Networks
