Yeh I tried the slide lock. Presently I have the whole theme installed. I activated the slide lock by mapping it as a shortcut from the clock, so tapping the clock locks the device...could grow annoying in time if I accidentally activate it, but it hasn't been a problem yet.
You could also make a specific button in WAD to link to the exe, but I don't use the clock/alarm preference panel much, so it seemed like a good fit for me.
The trial notification is pretty obnoxious. I'd love to know who made the program. Is someone planning on selling an iphone theme? Seems like asking for apple's lawyers to beat down your door.