How to partition my second hard drive in my Macbook to use as data with both Mac Mountain Lion and bootcamp Windows 7

Hi guys
So this is my dilemma...
I have a 13" macbook pro, I have just installed a 128GB SSD and am using that as the main boot drive and the bootcamp. I have split that hard drive in half (64gb each), one half is for OS X and the other half for Windows 7, no data is being stored on the SSD.
I have also replaced the Super drive with the original 500GB Sata drive and am wanting to use that as my Data drive. I want to partition that drive as 400GB for OS X data and 100GB Windows 7 Data (windows is only going to be used for work which wont be using too much storage.
Lets call the SSD as the OS drive and the 500GB as the Data drive...
Now i have currently formatted the Data drive in Disk Utility as MSDOS (FAT) so that both OS X and Windows can read data from it. I am not really fussed with the Mac being able to read what is on the Windows partition or vice versa but i do want to be able to store files larger than 4GB.
In the Windows bootcamp i have formatted the data drive partition as NTFS and that seems to work but I now cannot store files in the Mac partiton that are larger than 4GB, how to i get both HFS and NTFS to work on one physical hard drive to remove the 4GB limitation?
I hope i have explained the situation clearly enough.
Thanks
Ash

FAT32, what Mac/OS X/Apple calls MSDOS FAT, can only store files smaller then 4GBs in size. That is the limit of FAT32. So all you need to do is format the partition you want to use for the Mac "Mac Extended (journaled)" (If you can on a MBR partition table drive, Not sure) or exFAT.
But be aware that Apple's implementation of exFAT is flawed and Windows may not be able to read a exFAT partition formatted by OS X.
Everytime I have tried to format a drive exFAT on a mac and nthen move it to a Windows computer, that is Win 7 that natively support exFAT, Windows could not read the drive.
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