How can I fix my bootcamp partition?

Hi there,
I'm a relative noob when it comes to OSX so please be gentle with me.
I'm running an early 2011 Macbook Pro which initially had OSX Maverick with a Windows 7 Bootcamp partition. All was working perfectly and seamlessly until I enthusiastically decided to upgrade to OSX Yosemite which resulted in my Bootcamp partition disappearing. In my haste to try and fix this I looked through the apple support community questions and used fdisk to try and fix the issue.
It initially worked and I now could see the Windows option on the boot menu but when actually trying to boot into Windows it ended up saying "Missing Operating System"
I then tried to boot into Windows recovery using my Win7 CD in an attempt to repair the boot sector or whatever to no avail. I also started to try and repair the windows installation by installing it again and that crashed while I was working on it so now I have an "Unknown" area on my hard drive.
Then I installed rEFIT and partition inspector to try and fix it and this it the output:
*** Report for internal hard disk ***
Current GPT partition table:
#      Start LBA      End LBA  Type
1                  40       409639  EFI System (FAT)
2             409640    490273855  Unknown
3      490273856    491543399  Mac OS X Boot
4      563173376    625141759  Basic Data
Current MBR partition table:
# A    Start LBA      End LBA  Type
1              1       409639  ee  EFI Protective
2         409640    490273855  ac  Apple RAID
3      490273856    491543399  ab  Mac OS X Boot
4 *    563173376    625141759  07  NTFS/HPFS
MBR contents:
Boot Code: Unknown, but bootable
Have I well and truely ruined my bootcamp and have to start from scratch? It's not the end of the world since I backed up most of my important documents and pictures etc but it took me a long time to install all the software that I require for work on my Windows partition.
Any help or advice would be appreciated and again, please be gentle, I am a noob.
Thanks in advance!!

You have screwed up the original bootloader that enabled you to boot each OS properly. At best you can open Boot Camp Assistant and see if it will remove the partition, but my guess it will not. Hence, you must re-partition the drive back to one partition, OS X, then make a new Boot Camp partition. Alternatively, you can try using Camptune X for Mac | MacUpdate to manipulate, etc. the partition and restore the drive non-destructively.

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