[yast-devel] How to avoid rebooting between stage1 and stage2 of installation?

Hi all, I'm running some unattended_http_install tests on os12.3 and 13.1, I dont want the vm to reboot/turn off before the end of stage 2. I noticed that "openSUSE 11.0 uses the kexec feature and does not reboot anymore between stage1 and stage2. " How can I use this feature to avoid reboot? Do I need to modify autoyast file? Thanks, Lin