Thought it would be obvious when I figured it out... Just gotta mash F11 during POST.
It looks like you're supposed to be able to load an ISO using the iKVM, but it seems you cannot boot from this at all?
I know it's possible to use GRUB to launch an ISO but it seems a hassle for something that should be a simple "press F11" > "select cd drive".
Anyone used the kvm included with the latest servers (dont know if its dfferent)?
Cheers