Snow Leopard added write support for NTFS partitions.
However, the default mount status for NTFS is still read-only.
There is a GUI - http://ntfsmounter.com - for mounting a NTFS partition as read/write. When added to Login Items, may be used to mount NTFS partitions as read/write when needed.
DiskUtility may be used to unmount/mount as read-only.
This does conflict with the NTFS-3G package, which can be disabled (and eventually uninstalled once comfortable).
No experience with Paragon package.
Best of Luck