The EFI string in com.apple.Boot.plist will only normally include your Video and Ethernet so if you have built a DSDT to include Video & Ethernet then you can remove...
As for your audio, I have only tested here with ALC888 so as your moob uses ALC889A all I can suggest is you have a read of tmongkol's thread to double check specifics.
Lol, it's warm in the south west too
Has anybody confirmed that the CPU temp is actually higher and it's not that the temp is just being reported as higher?
As I got through my speedsteps the voltage and frequency increments are still the same with 10.5.8 but I have actually noticed a 2-3 Deg increase in temp at idle (Worth noting though London is quite hot this weekend - It's actually NOT raining ~) the Fan could be running at lower RPM or CPU could be pulling more current - ameter GUI anyone?
I'll be interested too if anybody has higher temps, as then I have to question is VoodooPower worth using?
For me so far, it is doing a good thing though