Ntfs/mbr error while trying to install windows 8. PLEASE help!

Question

Ok so before I explain anything I beg you to PLEASE not tell me I haven't read/searched enough for this because I'm already very close to throwing my macbook pro down the window and regretting it after a second!
Here's what's happening:
I have a Macbook Pro late 2011 (15 inch).
-I downloaded and prepared a USB bootable Windows 8 file.
-I used bootcamp assistant to create a new partition
When I turn on my laptop pressing the ALT key and choose to boot from eh EFI USB partition. I get asked to install Windows 8 and write down the product code.
Now, here's when it gets annoying:
1) I get the error saying that I cannot choose that partition because it's not an NTFS formatted partition.
    There's NO advanced options link on the bottom right corner. However, I can clearly see the Format button and when I choose the Partition and click format I get a new error saying ''Windows cannot be installed to this disk. the selected disk has an MBR partition table.''
So, I downloaded a software that formats the partition to NTFS using Disk Utility. However, when I restart, I will get the ''MBR..'' error again.
2) Concerning this second error (in case it was finally NTFS), I found another solution and that's the procedure of clicking ''SHIFT + F10'', choosing the partition disk from there and manually converting it to GBT or what ever that was.
Problem: When I manually type ''list disk'', there's only ONE partition showing as 495 GB (my laptop is 500gb) which obviously means that I'm not going to choose that and convert it to anything because it's the whole hard disk and not the bootcamp partition.
I closed the window and continued to see if I had forgotten to do the partitioning well, but once I got to the installation, my bootcamp partition was there in the partition windows, still giving me an error for MBR partition table.
So, please, I've restarted my laptop 50 times so far trying different ways to fix this, I've erased, formatted and divided the hard disk 1000 times and if I'm not mistaken that's really not something you wanna keep on doing to your laptop.
ANY help will be appreciated.
Thank you in advance!
invisible hugs to anyone who wants to help me.

Answer 1

Sebalex wrote:
I had modified the bootcamp info.plist file to be able to prepare the USB separately, I had done this step last year and had no problem back then, also it works for so many people so I don't know why not for me. Anyway, I modified it back to how it was originally... and well, unfortunately still not working.
This will not work, as you have already found out. BCA sets the NVRAM based on Model Identifier to boot from the Optical drive for Macs that are supposed to have built-in Optical drives. It works for people because there are a few select models which support both, for example my 13-in 2012 MBP. It is an urban myth that it works. What is the issue with your Optical drive? Did you codesign it properly (you need the --deep qualifier)?
The only resolution I know of, is to re-install OS X to get the BCA package back, if it does not work - OS X: About OS X Recovery - Apple Support.
When BCA restarts by itself after all the steps, I get the no bootable device message. And if I open it using the alt/option key which works fine, I get stuck at the step where I can format the partition to NTFS but I get the error mentioning the MBR partition table...
It is expecting to boot from a DVD in the Optical drive. Please try the DVD method. Make sure you reset NVRAM and SMC. If necessary, delete the current partition using BCA only, and start over again.