You can debug your emulator in whatever IDE you use then do something that uses that packet, see what the header is, then go into the emulator and find the packet.
Open your emulator in debug, enter your hotel, perform an action that involves this box, the emulator in debug mode shows the packet headers and names as they are processed, check the name, go into emulator to the server communication directory, find the packet that you are looking for by the header, the name will be there then find the class with the systems involved for that packet. Wash Rinse Repeat.I do not know the name of the packet, I think it is GenericAlertComposer but I do not know how to find it in habbo.swf
Open your emulator in debug, enter your hotel, perform an action that involves this box, the emulator in debug mode shows the packet headers and names as they are processed, check the name, go into emulator to the server communication directory, find the packet that you are looking for by the header, the name will be there then find the class with the systems involved for that packet. Wash Rinse Repeat.
Ahh, clarifying that in your original post would have been helpful.The problem is just this: My hotel does not have this alert, I want to do it.