I am quite happy about the tests results. Unfortunatly 64 bit support is not complete: I have found that executables once obfuscated run always in WOW64. Whereas dlls seem to run into 64 bit environment if obfuscated without inserting invalid opcodes. Seem that something is wrong into the PE executable so that the OS loader force the WOW64 subsystem to start. Untill now I don't have understood the reason completely so the 64 bit support for now is dalayed.