Oh... Actually I did. I used the files you listed in http://forum.xda-developers.com/showthread.php?t=1103399
which says ICS - CF-Root v5.5/6:...
OK, I'll try per #1.7, which is Siyah v5.0.1.
BTW, is it possible to upgrade to JellyBean by using Siyah v6.0 as in #1.8?
I've just tried Siyah v5.01 and the stock camera app is still not working but 3rd party camera is working.