Install a Xen PV domU from CD or ISO

I’m trying to have my first domU working…

As a first step, I want to install my PV domU using a CD.
This simple thing is really hard to realise with a PV Xen system, the lack of documentation about this is

impressive.

I had many errors :

Waiting for root file system ... ...
or
no init found

I used this syntax :

disk = [ 'phy:hdc,hdc:cdrom' ]
boot = "d"
root = "/dev/hdc ro"

I know that the root “/dev/hdc ro” is not correct at all, but I tried.
As I don’t have a full Internet access, to ask for help is not simple…
But I found this :

Currently, there’s no paravirtual CDROM driver available. So in PV guest, you can only add a iso image as a disk and cannot change this disk at runtime. But as a workaround, you can detach it and re-attach another iso as the same frontend.

I don’t have a VT enabled hardware, so I tried an iso without success… pffff

I use Vmware ESX at works, so I thought it won’t be difficult to get a domU working, but sincerly it is.