Currently, the autoconfig init script provided by the livecd-tools package calls "hotplug". In ~x86, hotplug is replaced by "coldplug" tough (including another init script), calling hotplug won't do anything.
Created attachment 42335 [details, diff] Let autoconfig call coldplug instead of hotplug if it exists
I'll get this into the next version of livecd-tools
Added and in CVS...