I am trying make a eDrive with TechTools 4.5.1. I have a WD mybook pro 500GB which I have formated for the task leaving 20GB as FAT32 for my MAC. The problem is that TechTools won't recognize it since MAC uses a completely other format than DOS.

How can I format the 20GB partition into a MAC read/writable partition and still keep the other remaining partition as NFTS for PC use?