External Drive, MAC & PC

hey everyone!
so i purchased an external drive (Western Digital Passport 320gb to be exact) for use of backup and data storage. My problem is this. I was a dumb idiot and didn't do enough research before formatting the drive. i than proceeded to wipe out the (wd320) drive and partition it into 2 partitions using disk utility in OSX. ( i made one partition for general use and one as a backup clone (bootable). this is where the problem lies. when i plug my (wd320) into a mac it's fine; however, windows pc's cannot read this drive. I read some online posts and it is to my new understanding that it needs to be a fat32 partition? is this correct? If so, is there a way for me to add an extra partition to my already partitioned (wd320) without deleting everything?
hope i laid out enough information to be helped..
THANKS IN ADVANCE!

Hi Jeremy,
It takes a bit of work in Terminal but you can have one partition FAT32 and one HFS+. Another option is to format the entire drive FAT32 but you couldn't backup System files to it, only data.
John

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