I spoke too fast.
Hon Mod manager works, it compiles mods and I have a generated resources999.s2z in game folder but mods don't work at all in-game.
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Fourth update:
Download regular hon mod manager here: https://www.dropbox.com/s/9kd14q7ncoa4lha/ModManager.zip?dl=1
You will have an error about HoN version but don't take care about it.
Enable your mods and compile.
It finally works!
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About x64 version, performances are incredible, constant 144fps, thank you!