save as message.bat in your pstools folder

::Save this script as message.bat in your pstools folder, syntax is as follows: message.bat IP/Hostname username password message
::example: message.bat 192.168.1.109 administrator Pa$$w0rd "Orite ya pleb"
SET ip=%1
set user=%2
set pass=%3
set msg=%4

psexec \\%ip% -u %user% -p %pass% msg * %msg%