For quite a while, we've been installing our POWER5 LPARs one at a time by activating it, booting to SMS, fill all the netboot menus and finally selecting an ethernet adapter as the boot/install device.
But there's another way, which doesn't boot quite as fast(eg. it waits 60 seconds for spanning tree to settle), but you just send the command and all the rest goes automagically.
It's called
lpar_netboot
and works like this: