1)Set up sPit
This doesnt need to be installed on the server, just the computers that will send messages.

Unzip dist.zip to somewhere on the computer, ie c:/spit
then open c:/spit
shoulde be a file called dist, open that.
right click on app1.exe , select create shortcut.
Copy this shortcut to the desktop so you can run it easiily.

2) Set up a shared folder on your server , ie c:/pitsend
can be anything but needs to be shared so other computers can access it.

Open MD
select tools>manage communications>setup data transfer>add

description spit

The import folder and export folder should point to the shared folder you make on your server. ie \\ your server name\\pitsend\

click ok.
Run the app1.exe shortcut you put on the desktop.
should get this

Select file,>options
browse through to the shared folder you made on the server and select ok.
Enter Doctor and staff names then close the set options window. We set up doctors as 
1 Smith
1 Jones
1 Black
this way the doctors can see if they have messages in MD, as it will seperate them out from other results for Dr Smith as MD treats 1 Smith and Dr SMith as two different people, but this doesnt really matter.

To send a message , click in the surname box and enter a name ie "smit,j" then hit ENTER
a list of matching patients will pop up.
Select the patient you want and hit ok.
select to, from, and a title,
Type a message down the bottom and then hit send.

The message should now be in the shared folder on your server, waiting for MD to read it.
Depending on how MD is set up it should appear in MD in 5-10 minutes.
[can set this import interval in md   Tools>manage communications ]
When the Doctors go to results, the messages will be there.