You'll have to be more specific about what problems your having not being able to host a game. What error messages, if any, are you getting. What's you system setup..etc..etc.
As for blocking rockets. Check the downloads section for this board and you will find a 'norockets' mod. Unzip the file into your mohaa/main directory and next time you load the game will see it and use it whenever you host a game. It only works for you if your the server.
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