Abstract: The disclosure is directed to systems and methods for customizing boot disk images using prioritization. In one example, a series of source files are copied to a staging area. Earlier received files are overridden by later received files of the same name. Pre-boot operating system files are copied first, followed by a software manufacturer's supplied files, then an original equipment manufacturer's supplied files, and finally user supplied files. Since each file is overridden by a later one, the prioritizing of copies to the staging area presents a prioritized file structure to create a boot disk image. Commands are run to further modify the files. The files are compiled into a boot disk image.