Read and Write NTFS partition under Snow Leopard

This is experimental, and known to be unstable, use at your own risk.

You need to modify /etc/fstab file to mount NTFS partitions for read and write.

• First, uninstall NTFS-3G/Paragon if installed.

• Open Terminal
  run diskutil info /Volumes/volume_name and copy the Volume UUID.
  Backup /etc/fstab if you have it (shouldn't be there in a default install).
•  Run sudo vim /etc/fstab and write:
  UUID=paste_the_uuid_here none ntfs rw
  or
  LABEL=volume_name none ntfs rw
  (if you don't have UUID for the disk).
  

• Repeat for other NTFS partitions.
• Restart your system.

Thats all!

source

(great web)