Not to sure

[Black Parade]

What exactly this plugin might be called, but it basically works like amx_imessage, but instead of displaying it as if an admin were saying in-game with the @, it displays it as if someone were using HLSW and saying things.

Example: <This Server>: Welcome to This Server!


In stead of:

Welcome to This Server!
(This being displayed near the top of your screen in vibrant colors.)


If anyone has any clue of what I am talking about, I would greatly appreciate it.

[Hood [10th MD]]

you can do this in rcon at will if you have rcon access
(rcon say "Welcome to this server!")
or adding to your configs something like that

both of those only happen when config/command is executed though, you would need to script a similar function to imessage and just change it to "say"

[Tank]

I would like to help you but im not sure what you mean. So basicly I will give you two options and perhaps it will provide you with an answer to your questions:

HUD Message
If you are talking about a HUD message (the vibrant colours) you could use imessage. Lets say your server name is: I love tankypooh.

Use this imessage (amxx.cfg):
amx_imessage "%hostname%: Welcome to this server" "000100255"

The outcome will be
I love tankypooh: Welcome to this server
with "I love tankypooh" being the servername and "welcome to this server" being the message

Say Message
On the other hand if you are talking about how a message would look like when an admin is typing through hlsw, you could use this plugin:

link (http://forums.alliedmods.net/showthread.php?p=207110)
What this plugin does is allow you to have messages being automatically being shown on your server but then just in chat.

Perhaps you need to look through the plugin as it has a cvar allowing you to set time between the message spawn but I haven't used this plugin in a while since I use a custom one created by Synthetic but at first glance it looks like the messages are triggered by people using certain words. But perhaps you can either change it a bit to it just shows messages without being triggered.

I hope I was any help to you.