To avoid any confusion or concern I may have inadvertently caused, when I said that we were not likely to get the original header files, I meant that we would then have to work with the open source header files we thought closest to when they forked off their own kernel, not that we should find some way to hack their header files without paying for them. If using the open source kernel header files is not close enough to cross-compile a stripped version of busybox, or even just a modified version of nandwrite, then we give up on the project. And at this point in the program, I doubt that I will be able to convince management to pay for having the programs cross-compiled by the vendor, even though the vendor has the whole cross-compiler setup running and dialed in for years. So if we can't do it in house with open source, then no joy and we have to make due without.