Lock Messages

[wooo]

I know there is a way to lock the whole phone, but i was wondering if there is a way to lock just my messages. Because whenever i lock the whole phone you can still see what the text i get says, is there a software or something that will do that? I don't really wanna pay for anything but if its the only option i might

[wooo]

will i be able to lock my messages to where no one can see them with butler?
http://software.everythingtreo.com/p...d=376&n=Butler