Modern linux kernels use the kernel module autoloader, so you won't need to insmod the module if its present, just try to mount your windows partition -
Code:
mount -t ntfs /dev/hda1 /mnt/win/
Replace /dev/hda1 with the partition corresponding to your windows drive, hda1 is the first primary partition on the first hard disk (usually C drive if you installed windows first), hda5 will be the first logical partition (usually D drive) and so on ...
BTW if the module was not loaded automatically, try
modprobe ntfs instead of insmod, it will load the dependencies (if any) along with the module.