How to create a USB harddisk/flashdisk partition that can install multiple versions of Windows and Linux in both UEFI and legacy-MBR mode

1. Download MPI_Tool_Pack_Plus_CloverLite and Easy2Boot. 
2. Run "update-E2B" to create an Easy2Boot bootable partition on your USB harddisk/flashdisk. Take note that your E2B partition must be the 1st partition on the USB harddisk/flashdisk, and its size must be smaller than 137GB.
3. Use MPI_Tool_Pack_Plus_CloverLite to convert all installation .iso to .imgPTN fat32 images (which has a sector-for-sector low-level format)
4. Copy all .imgPTN files into respective folders in the E2B partition, Ubuntu/CentOS/Redhat images into /_ISO/LINUX folder, Windows 7/8/10 images into /_ISO/WINDOWS/WIN# folders respectively.
5. You can also copy .iso images directly into E2B folder for Legacy(MBR)-only boot install.
6. Run the "MAKE_THIS_DRIVE_CONTIGUOUS.cmd" in the E2B folder of the USB harddisk/flashdisk to make all files continuous.
7. Subsequent partitions of the USB harddisk/flashdisk can still be used for storing files and data.