Hi I'm actually using iatkos 4i 10.5.4. All working great but normally no sleep. I'm using intel speedstep kernel 9.2 with sistem version 9.2, so usb and all works great.(battery monitor/charge speed step using acpicputhrottle and speedstep.app) It's better to install voodoo kernel? And if voodoo kernel is better than speedstep, were i can find the right version of system.kext (i suppose 9.5 but i don't know what is the newest version of voodoo kernel) The aspire one could run more fast with this kernel (now using xbench the score is 44). Thanks