You can do it manually for now. You CANNOT use the new inits with 1.2.0, if you download those and place them, no imaging will work at all. Just try the new kernel and keep a copy of your old kernel incase it bombs. Link here for steps:
https://wiki.fogproject.org/wiki/index.php?title=Kernel_Update
Make sure you pay attention to the old file name before moving it - I think 1.2.0 was 32 bit. The kernel bit has to match the init bit.