Hi,
A first version (2017-01-18) of SL 7.3 LiveCD and LiveDVDs is now available for testing:
http://www.livecd.ethz.ch/download/testing/73/x86_64
The images are based on SL73 RC2. You can burn the iso file to DVD/CD or 'dd' them to a USB flash drive:
dd if=SL-73-x86_64-2017-01-18-LiveDVDkde.iso of=/dev/sdX
where /dev/sdX is your USB flash drive. Caution: ALL DATA on the USB flash drive will be DELETED !
Cheers,
Urs