You don't need an app. Just use the autotext option and define something like zz as your signature. Just type the desired signature with line breaks, etc in a blank message. Copy it and enter a new Autotext item, pasting in your signature.
@sheldonbk
well yeah i already know of the autotxt feature. im lazy and think it will be easier if the signature would be automatically added. teh smartsig app seems cheap compared to alot of apps out there so i think its worth it. plus after a few times of typig "xyz" for a signature, i got annoyed of it and just said "screw it". so i would rather have an app for that.
and thank you for showing me the app, i will be buying it soon. ^_^