Read and write NTFS volumes with Mac OS x
Mac OS X may be an operating system without built-in support for writing to NTFS (the file system in Windows). For example, if you have installed Boot Camp and Windows on your Mac you have a partition to which you cannot write. You can copy files from your Boot Camp drive but not copy to [...]

Mac OS X may be an operating system without built-in support for writing to NTFS (the file system in Windows). For example, if you have installed Boot Camp and Windows on your Mac you have a partition to which you cannot write. You can copy files from your Boot Camp drive but not copy to it.
So what to do?
The solution is simple and free. You download MacFuse and MacNTFS-3G and install both. After that you may have to restart your Mac but you should be okay with using Disk Utility to dismount and mount the Boot Camp partition.

Hey guys, if you have Snow Leopard I suggest you to use iNTFS.. just a click and it will enable the NATIVE write support without having to struggle with Terminal.
download it from here:
http://www.itecnologici.com/?p=674&langswitch...