Once I've seen such a mutator in a server,I think it is a good addon to MH games.Anyone know more info about it?
And I think UTJMH is at v403 now,but UTJMH here is v29.Is it just me or the file is old?

After v2.9 the developers of UTJMH stopped making it a public release as far as I know. I have been unsuccessful at finding any versions above v2.9, so if you have it then upload it for the MH community.

I would like to state my point of view in this ....

If someone creates something they do not want to share with the public they keep it among friends, therefore it's bad IMO to urge people to break that trust and upload private files for the public.

It's ethicaly wrong. Instead ask for permission. I think gopostal already made an updated version of the (noninternational original) for the public?

I'm working on a simular lutator myself, though it's paused because i want to see the end result from gopostal as he is much more into MH than i am, but when i finish it up i will make it public.