Hello all. Based on the information from 
http://mjg59.dreamwidth.org/7468.html I intend to add support for such 
install. It requires a small HFS+ volume mounted at /boot/mactel. I also 
simplify handling of EFI directories by adding explicit option to 
specify it and removing some "compatibility" kludges (they don't make 
anything compatible with anything since "old behaviour" was mostly not 
to install at all) which made the code in question difficult to 
maintain. Patch attached and branch "mactel" pushed. I've tested only as 
far as to see the appropriate directory structure in place. Can anybody 
test it on real mac?

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Regards
Vladimir 'φ-coder/phcoder' Serbinenko