How to write to announcements (Java server)? : Lineage 2 Submissions

It is required to us: sniffer and a few patience... We Write in the client any phrase, we catch a type package say2. In the end it is visible 0X 00 00 00 Where х - a variable of type of a chat, we replace X on A and it is sent on a server. The phrase will appear in announcements.
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Excuse for my English=()
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One more thing for java servers (video):
(it is required to you a little D cry and adena)
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