Is there a way to customize SMS quick text? I have an LG Ally.  I have a market SMS popup app that lets me customize the quick text, but that only works if someone texts you first and it pops up.  Sometimes I need to sent a quick text to someone that hasn't texted me first, such as "driving" or "call you in a minute".  The stock quick texts on the Ally messaging app are pretty lame, and I haven't been able to figure out a way to customize them.
The Handcent SMS app allows for custom template messages.