Creating New Text Templates
This was driving me nuts!
If anyone else has the same problem (creating new templates) then do the following:
messaging>menu>settings and look under "Storage Settings" where you will see "set text templates". You can edit, delete and create new templates in here.
When you want to use one just compose a new message and tap in the message box, menu>Add text>Text templates and select the template you want.
Easy when you know how!