Mounting a portable USB 80GB hard drive on my Fedora Core 3 box was relatively easy. By default, Fedora leaves out the NTFS support due to legal issues. I used YUM to install NTFS support. No issues whatsoever with the installation. Unfortunately, NTFS support is READ-ONLY. I tried mounting the drive automatically via fstab, but I ran into permissions issues. It works manually for now.
mount/dev/sda1 /media/Portable_HD -t ntfs, -r -o umask=0222
/dev/sda1 /media/Portable_HD ntfs umask=0222,ro 0 0 (fstab)