It's possible but you have to re-create the message board functionality from scratch and implement a new XML UI window. MacroQuest supports doing this and you could easily rewrite what MQ2 has. The current client does not support it natively, but it's possible in theory.
For example, a packet-based DPS window for Rain of Fear 2 clients exists and it uses packets that are not normally in the EQ client. It's the most accurate DPS meter our there because it doesn't rely on the client's received data alone. The same could be used to make an XML/packet based message board system.
Having 13 years of autism on this project has its perks.
[You must be logged in to view images. Log in or Register.]