On your real Storm, use Options/....to discover that the OS uses the module name net_rim_bb_clock. Put this into the third party launch slot in Composer. Ooops, didn't really read the question. Sorry 'bout that ! Best I have been able to come up with in my Zen Tesla theme is attached. Here we are looking down, down inside and the OS echoes the Clock focus at the top. If you placed this on your custom home screen, it would not echo, but by using the button style I advocate, you at least see something.
Doctor Neutron