Hard drive formatting for OSX and Windows 7 using GUID

Hey,
I am currently trying to format a 2TB WD Elements external hard drive so that I can use one half with Time Machine and the other half with Windows 7 (run using Boot Camp). From looking around online it appears that GPT is the best to use, and so using Disk Utility I formatted the hard hard drive into 2 partitions, one being Mac Os Extended (Journaled) and left the other as empty space. I then switched to Windows 7 (on the same machine) and formatted the empty space as NTFS. The problem is that now Windows 7 can see both partitions (and can see the contents of the HFS partition which I didn't think would be possible) but OSX can only see the NTFS partition (and has changed the label of the HFS partition from what I set to "disk0s2" when viewed in Disk Utility). I've probably done something very wrong, can anyone help?
Cam

you would have been fine had you set the free space to FAT instead.
You can read only from Windows to HFS unless you buy 3rd party HFS driver.
Same for NTFS only reverse.
You do not need or want to use BC Assistant for that external drive. At. All.

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