@Herve Thank you so much for posting this info.
Followed what you had typed above and am installing Yosemite for the first time without using some internet hacked version and no kernel panics. Through reading I knew I somehow needed to inject and boot from a different kernel to get Yosemite to boot and this guide really helped me to understand the steps.
I applied the OS Package framework fix for MBR since I multi boot Windows
I did get an error about no driver for IOPlatform so I booted with -x and am using built in keyboard and mouse. I will follow up with what did or didn't fix it.
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Ok, I have Yostemite running on my computer... I just upgraded over top of my existing install of Mavericks that I installed using the guide by same author referenced in OP.
After initial boot, I got a mach_kernel not found so I just typed in /System/Library/Kernels/kernel as a boot arg (hitting tab in Chameleon loader), this allowed me to complete the install. I then ran the script from the Yosemite Guide to copy all kext etc. It error'd on HDA saying it was a directory so permission error needs to be sorted there.
I don't have updates, but this has to do with something using MyHack or a certain kext that disappeared the serial # ... these are off topic issues so thanks again, follow the above and use the correct kernel and you can't go wrong. Really helps to have a working OSX install to manipulate files onto the new boot drive - I have Mavericks loading off of a USB3. I have an E5530 in the mail so looking forward to applying this OS to it as well!