Wee... after a helluva lot of guesswork and eventually giving up and staring not just at the spec but at a disassembly of PXE code in memory, I think I have a recipe that allows at least Intel PXE 2-derived PXE stacks to be cleanly unloaded from memory. Please try it out... http://www.kernel.org/pub/linux/utils/boot/syslinux/Testing/ This is *basically* a 1.75 release candidate, although there is some debugging code I want to remove first. -hpa