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To learn about all Anaconda's Kick Start script options, read this.
Running the installer
As soon as Grub downloads the kernel/initrd, that'll setup the network and it'll download squashfs's stage 2 image. Once that boots, you'll see a screen with a message:
Starting installer, one moment...That will hang in there for a while if you have a broken IPMI image.
Working around the
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IPMI bug
There is a bug in the ipmi tool IPMI tool for now, so you'll need to kill it before the installer can execute. It'll hang saying waiting for the installer. This is due to the ipmi tool IPMI tool being locked.
Until we find the cause of the hang, you can work around by killing the process.
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This will free the installer to proceed. To go back to the installer pane, just use ctrl+b+1p.
Installer options
The If you haven't selected inst.cmdline, the installer will ask you what type you want.
If you want to use VNC, you'll have to attach it somehow. If you just want a minimal install, use the KickStarter Kick Start script attached here and select "consoletext mode".
If you have added the right KS file in the machine setup and have chosen inst.cmdline, the installation will proceed automatically.
Working around the
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IPMI bug (again)
Once it gets to "Running post-install scripts", the ipmi tool will hang again.
Same thing as last time, (ctrl+b+n), pgrep ipmi, kill the PID.
Restarting
Finally, the installation will say it finished. If all went well, you should be able to reboot (no PXE) and wait long enough for a CentOS prompt.