Thanks a lot Tikifg, for your patience and support. I had a breakthrough after all these days and able to install OSX. The issue thats blocking me all these days is VTd/Virtualization IO setting in BIOS. I turned off that in BIOS and I am able to boot into OSX without -x (safeboot).
I have 1 last question, whats the best way to install the kexts you posted, is it Kext wizard? Should I install them to Extra forlder of System/Library/Extensions folder?
Do you have an elitebook 8570p also ? which guide did you follow to do the install mate? Do i need to purchase the original mountain lion image (or will an image from another source do ? )