ur parallel desktop idea is good as long as u're willing to go thru the hassle

that being said, i nvr had problems using ntfs-3g other than the speed. maybe u shud try tuxera ntfs or paragon ntfs, both are paid software n third party

btw u are correct, only fat32 can be used on both OS natively but there's that 4gb limit. there is a windows program called macdrive that lets a windows OS to read/write HFS but i have not personally tried it yet so i cant say much. proceed on ur own risk