Most tutorials show you how to create a "multi-boot USB." That is easy. But creating a that can later accept new DLC without being remastered is the holy grail. Why? Because you might burn the ISO to a DVD (read-only) or a Write-Protected USB. You need the bootloader to be smart enough to look outside the ISO for additional content.
Create a workspace:
A simplified dlc-loader.sh :
DLC Boot is a comprehensive rescue disk, similar to Hiren’s BootCD. It creates a "Mini Windows" environment (WinPE) or a Linux-based interface that runs entirely from your RAM. This allows you to troubleshoot a computer even if the primary operating system is corrupted or the hard drive is failing. Key Capabilities UEFI & Legacy Support : Modern versions are fully compatible with (the modern standard for PC firmware) and older Legacy BIOS Data Recovery dlc boot uefi iso
If you don't need true "Downloadable" content and just want a multi-boot ISO that works out of the box, place the ISOs directly into ~/dlc_build/iso_content/isos/ . However, this makes the ISO massive (e.g., 20GB) and inflexible. The DLC method keeps your base ISO under 50MB. Most tutorials show you how to create a "multi-boot USB
function load_dlc_menu