So here the deal. I have a single hard drive in my MacBook Pro. Its made up into 2 partitions (one for os x and the other for data). I want to make the OS X partition into 2 separate partitions (so I'll have a total of 3) without erasing any data. I want to use that new partition to install windows. When I select the OS X partition, and set it to format at NTFS, it says the size cannot support the filesystem (25GB in this case). What size does it have to be then? Or should I format as FAT32? I know FAT32 has a 4GB file size limit so I don't want to do that because I want to install some games on the Windows partition. How should I go about doing this?