Shoutbox

Just wondering if there is any script that will allow us to show personal message to centain contacts, we can choose who to show and whoever else not to. Been search for this script for a while, but foudn nothing.

Nope. This is a limitation of the protocol.

You wont find anything because that is not possible.
This is because in the way the personal message and the protocol of Messenger works.

The personal message is stored on the Messenger servers and is automatically read by your contact's Messengers. You can not prevent that in any way.

The 'personal message' should not be seen as a private message system to certain contacts, but as a public message which you can personally edit.