Okay, so here's where I am right now:
I installed my atheros osx compatible (I think it's the 9285) wifi pci card in my new 6570b from my old ML 4540s. The wifi card works in windows, so it will work on OS X as well I think. After that I removed my 1080p screen from my 4540s and reinstalled the stock screen and single link cable. My 4540s is now fully working again on windows and ready to be put on ebay or somewhere else.
Then came the difficult part. I booted my 6570b with my ML SSD from my 4540s and it booted into chameleon. However the dsdt is set up to work on a 1080p screen so no screen after booting into OS X. So I began to strip down my 6570b to install the 1080p screen I have.
My 6570b has a 1366x768 screen and I found that they ship these models with the single link cable, since the 1080p screen needs a dual link cable there is no point in installing the 1080p screen now.
So i began to strip down more of the 6570b to replace the single link cable with the dual link cable i have ordered for my 4540s. The connector on the motherboard is different than my dual link cable so I have to order the 6570b dual link cable.
I am looking for a product number for this cable, but no luck yet. Any help finding the right cable is very much appreciated!