I don't know about Mandrake, but with FC3 I installed (not shipped with Fedora, though) the ntfs module that does read-write access,
It isn't recommended, afaik, to use that write possibility..
I have a dual boot system, and have three (excluding my boot and swap partitions) partitions: one for Linux, one for Windows, and one for both, which is FAT32. This is a filesystem both understand, so that's how you can share data storage between the OSes..
Hope this helps.