Harry Sintonen, creator of BlizKick, released a small update, v1.24rc2.
Below is from the readme:
"*NEW* in V1.24rc2:
- Updated romupdatesplit to handle OS 3.9 BoingBag2. It kind of worked before too, but named some modules unknown."
BTW, this is also a full sourcecode release, in case anyone's interested in learning how things tick.