If I cannot get this one working I would like to try your bootloader suggestion Phantom-84, but I'm afraid those steps are kind of complicated for me to follow.. I don't know how to write Alter-3.bin into the MBR and I don't understand step 2 at all.
I'm not providing setup tool for Alter. But you can use any suitable hex editor, e.g. HxD
Does "bootsect /nt52 k:" not work? bootsect can be found in folder "boot" in distribution disk.
I see that your Windows partition is not active now, so using grub perhaps will be easier for you.