Comment 1 for bug 224431

If you'd rather partition yourself outside of the installer, then your only option is to copy the contents of /rofs to your new root partition yourself or use the alternate CD installer. I do not believe there is a large enough use case to warrant adding a potentially confusing option to the UI to skip partitioning completely.

Regarding your bug, do you have a serial cable available? I suspect this is a kernel bug and thus will need the log you capture over a serial console up to the point where it freezes.

Thanks!