The rom is presented without kernel: Who has already installed a previous version can only flash the rom using odin will not update the kernel.
However, those who have another rom, you must first install the kernel with Chainfire CWM 3.0.0.5, and then the rom flasher separately.

You need to have Chainfire ClockworkMod recovery installed.Boot phone in recovery mode and just flash the zip file - no need to use Odin

If you have installed earlier versions from AngeloM - this recovery is already install

If you are using other roms probably this Clockwork recovery is not there - install through odin than - checkup the link at XDA SGS II Android development thread

Please go and read the XDA thread to find out more detaills of the AngeloM rom.
What I am saying if you are already on AngeloM rom, you already have Chainfire CMW recovery - go to menu - browse your apps you will see an app CWM
Ver 1.5 NEED NOT use odin to flash - just boot into recovery and flash the zip file.
And if your phone has NO CMW - than install Chainfire CMW first using Odin
I thought I have already written clearly ; my English must be bad than