shm/shmfs is the filesystem used by used for temporary storage as tmpfs .
/dev/shm is the physicaly shared memory from RAM which is used to speed up execution in Linux/unix . i.e. if a programme is...
You have to install FUSE module manually 1st ,then install ntfs-3g ,then only u can mount the ntfs filesystem .
Or you may use repositories of rpmforge/epel to install them through yum .