For low lighting you need to increase your exposure time. Long exposure times make for blurry images if you don't have a steady hand.
As for the image you posted (the first) it was **** with a 1 second exposure, 3.5 fstop at iso 200. According to windows, im not on the mac atm so don't have access to mah photo tools.
This is kind of a lot of information but my original edit got lost when Firefox crashed and cant be ****ed typing it all up again so:
http://forums.atomicmpc.com.au/index.php?showtopic=72
EDIT: Marc the problem you have with your 2nd picture is mainly the amount of light behind the object IMO.