You can easily make an updater in your script.
Just have the latest script in a folder on your server.
Making the contents in the folder what you want them to download.
Then have a text document on your server that has a version number.
Then function:
Simba Code:
if ScriptVersion = ServerVersion then
Exit
else begin
Client := InitializeHTTPClient(False, False);
UpdatedScript := GetHTTPPage(Client,'http://mserver.com/folder/UpdatedScript.txt');
Then create a new file and write it.
Let me know if you need help with this ^ 
-Boom