-open notepad.
Code:
21#\Windows\tmail.exe -to "555-5555" -body "some text" -service "SMS"
-save as "I like to spam.lnk".
-put it in \windows\start menu\programs on your phone.
Now you can open a new text message with the phone # and body already typed. You just have to hit send. You can also set it as a button or whatever you wanna do.