I have setup a New SCCM setup.
I have my required WIM file and i have created a task sequence. I have configured my x86 boot image to "deploy this boot image from the PXE service point" I have uploaded all this to a distribution point. I have deployed the task sequence to a machine where my test machine already lives. It had a previous install of windows on and has been talking to SCCM for a couple of weeks.
When i PXE boot i get the attached.