Yes, send WOL pakets every 3 Minutes.
This is a small Python script you can use (copy the text into a file and name
it wol.sh so you can start it via command line):
s.sendto('\xff'*6+'\x00\x24\xA5\x45\x69\x11'*16, ('192.168.172.100', 9))
print "Sent paket!"
Just replace the IP address (192.168.172.100) with the IP address of your LS Live.
Btw. A LS Live was NEVER PowerPC based -> wrong forum.