Ok so I removed the MD from the admin, ran the script( twiddled my thumbs for half an hour), reloaded the router....PXE booted the pc and it ran the diskless setup, then it restarted itself now it is stuck on the following message:
Could not find kernel image:80/vmlinuz
Thanks for the help
Edit: I deleted the MD using the GUI and rebooted the hybrid, then tried PXE booting again, went through the same process and failed in the exact same way!!! is there something wrong with the kernel???