it is easy! see:
DeviceAddress Probe01 = { 0x28, 0xFF, 0x??, 0x??, 0x??, 0x??, 0x??, 0x?? };
/// set the resolution to ANY bit you like - Valid values are 9, 10, 11 or 12 bit.
/* Resolution Increment Time
9 bit 0.5 degrees C 93.75 mSec
10 bit 0.25 degrees C 187.5 mSec
11 bit 0.125 degrees C 375 mSec
12 bit 0.0625 degrees C 750 mSec
*/
sensors.setResolution(Probe01, 10);