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Another way to install the kernel is to use an existing operating system in order to compile the kernel binary. This is called cross-compiling, because it is done between two different platforms. If the pre-built kernels are not working for you, and you can't ask someone to compile a custom kernel for your machine, this is your last chance to get a kernel that boots on your hardware.
Luckily, the kernel does have light dependencies. You don't even need a cross compiler if your build machine has a compiler and is the same architecture as the system you want to run GNU Mach on.
You need a cross-mig, though.
XXX More info needed.