A cool feature that was present in previous OpenSuse version (for what I remember) is that you have an option to boot an installed system during the installation. But this feature seems to be no longer here.
To be clearer:
- boot on the dvd or live cd 
- Select the install option
- the install option have install, upgrade or boot installed system.

The last option no longer present and I think it should appear somewhere. Right now, I have lost my grub boot loader, trying to use the repair option using the repair tools does not help since the installation of grub seems broken. so I have have to option to boot on an already installed system (or partition) then I can get my os loaded an try to troubleshoot from there.
I put it as an enhancement because it is not a bug, but I think this option is important to troubleshoot.