While you're at it, you can make it refocus in video mode:
in cameras.h, add:
#define CAM_AF_SCAN_DURING_VIDEO_RECORD 1
for 102c, add:
NHSTUB(ExpCtrlTool_StartContiAE, 0xFF844034)
NHSTUB(MakeAFScan, 0xFF940504)
for 103c, add:
NHSTUB(ExpCtrlTool_StartContiAE, 0xFF844034)
NHSTUB(MakeAFScan, 0xFF9406CC)