lol, that's my biggest fear. still being inadequate with a flash, but it's a start!.
the 58 flash does integrate a bounce card (finally sony!), that helps a BIT. And for a single flash, a large diffuser would probably be necessary. Clearly, I have no idea what to expect though. This should be interesting.
How long do those batteries last you in your 42? They seem a bit on the weaker end in comparison to the ~2000+mAh batteries now.