Hey macorhack and POSTpro, thanks for the replies. I had followed those threads and guides, but with no success.
MiniITX kindly stepped me through the install, and after several hours, and a few fresh installs, we finally got a bootable system.
The HD4000 proved to be the big issue for me.
We re-flashed the BIOS and started from scratch. Fresh install, and then in multibeast all we needed was the DSDST/DSDT Free, Audio and 1080p (in customisation). Once we did that, we were pretty much set.
In reality, we had problems after this, but it was due to us messing around with the BIOS settings and straying from the recommended settings.
Hopefully im not leaving anything out here, but if I am, I will update tomorrow, its late!
thanks to everyone on the thread who chimed in to offer assistance. I would still be pounding my head off anything close-by and solid if it werent for the help.
Right now, I am using the system and trying to take note of any bugs. The first of which I found fairly quickly while trying to download XCode... I cant access the app store, and i cant connect with iCloud. I did a quick search and there seems to be solutions on the board for this, but I'll leave that for another day!
Again, thanks all.