using kakewalk 4.5 for initial install
somehow kakewalking after install fails so:
Using latest BIOS again (F11)
then using dsdt and multibeast 5.5 > easybeast install with dsdt (has to be on desktop)
using Audio > With DSDT > ALC888 “current” (as opposed to “legacy”)
also use TRIM enabler
here the dsdt – put on desktop and run multibeast
DSDT-GA-EP45-UD3LR-1.0-F11.aml
then update using the combined update pack and do the same again :)

Update1: Chameleon corrupted
sometimes, if you have multiple harddisks (and one of them windows) the chameleon bootloader is being confused and dies – you can still start up with a unibeast/myhack/kakewalk USB stick but to fix the issue you need to use: Chameleon Wizard
there is one way to use when you have another disk that contains windows :)

update2: White screen with R9-280x/Radeon 7950/7970
basically editing /Extra/boot.chameleon.plist and setting “GraphisEnabler = No” allows the card to work (use PartedMagic to start up and use fsck and mount to get write access if you had “yes” before…

#fsck.hfsplus -f /dev/sdax
#mount -t hfsplus -o force,rw /dev/sdax /media/sdax

Now, the card will start up but will show only white.
If you make the hackintosh sleep and wake it again it works! So let’s just rotate the screen 90 degrees and put it back to normal. here a Rotate screen fix converted into an app (use with assistive technologies)
http://www.tonymacx86.com/graphics/124093-r9-280x-mountain-lion-white-screen-fix-inside.html