I'll look into it, but it's pretty low on my priorities list. Most of the wacky governors don't provide enough benefits to justify the risks. Nearly every time I've seen someone release a kernel with a custom governor on the Infuse it was broken and did all sorts of strange things. Again, stability is my #1 goal.
To my knowledge, I've seen reports that SGS Kernel Flasher won't work on GSIIs.
My guess is that it hasn't been updated to account for the fact that the GSII has moved away from Samsung's proprietary STL/BML partitioning crap.
You can achieve the same results using ADB, or even a terminal emulator session:
Code:
adb push zImage /sdcard/zImage
dd if=/sdcard/zImage of=/dev/block/mmcblk0p5