I've followed the instructions here:
I've managed to get the openSUSE loading screen up. One of the options is to install openSUSE the other is to boot from HDD, neither of which let me load it as a live usb.
This is the iso I downloaded, and the section below says:
How to Proceed
After having successfully downloaded the ISO image(s), create a bootable USB stick or burn the image(s) to a DVD (or a CD if the chosen image fits).
Which makes me think there isn't a separate iso for booting to a live USB.
As far as I remember, doing this with Linux Mint and Ubuntu you load straight into the OS and don't need to install it.
So how do I load a Live USB of openSUSE?