The source for the modified (MacOSX) BootX that MOL uses has been integrated with the main source package. When you build MOL, BootX is built from source add added to mollib. I've patched it a bit to add in the 96MB memory map support from Apple, but if someone else could verify that it works for them, I'd appreciate it. :)
I've also fixed those annoying gcc4 warnings about -I-, hopefully that didn't break anything, but again, I'd appreciate some testing.