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+mbootpack (Multiboot kernel and modules)
+
+This is a tool that takes a multiboot kernel and modules (e.g. a Xen
+VMM, linux kernel and initrd), and packages them up as a single file
+that looks like a bzImage linux kernel. The aim is to allow you to
+boot multiboot kernels (in particular, Xen) using bootloaders that
+don't support multiboot (i.e. pretty much anything except GRUB and
+SYSLINUX). This is, as you might expect, pretty grim stuff, involving
+lots of lovely 16-bit real-mode code.