NTFS-3G, Tuxera, Paragon drivers for writing NTFS won't work in 64-bit, even for Vanilla kernel, the only driver that works for 64-bit Snow Leopard is hidden inside Snow Leopard, you have to active it to use it, however, in my case, and from other people as well, it will make your NTFS partitions errors

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10.6.2 Pcj 64-bit kernel | Mobo Asus P5LD2-VM Revision 1.03 945G/ICH7 Graphic Intel GMA950 | CPU Pentium 4 630 3 GHz HT
Sleep never wake up, Quicktime 64-bit crashed

10.6.2 Vanilla | Mobo GigaByte GA-EP43T-UD3L | CPU C2D E7500 | GPU GigaByte GV-N240D3-1GI Nvidia GT240 ( Full QE/CI )