DSDT with fixes for audio, SATA ports and USB devices for sleep.Leo says that the new eyetv company is now called Corsair and he says it's a good company. Legacy 64 bit mode using chameleon bootloader. Thanks to advice from this post by MacEFIRom.
Ok so booting into 64 bit mode is a piece of cake.well a bit of tinkering if your running software RAID but all okay in the end.