Walkthroughs for custom maps.

Is there anyone here? Has no one played the great map "Jedy Story" created by a talented Russian player? Please tell me where the sphere of vulnerability is; I'm stuck on the last castle and can't defeat the border guard at the end of the map. I've been posting on all the Heroes 3 forums for two months, but no one has responded. It's like talking to a brick wall.
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