there are some bootup rescue CDs that allow you to bootup with some freeware tools. Those have some basic files management and partition and other software.

I forgot what it's call. Maybe you can google around.

As for using DOS, there's NTFS DOS that support NTFS partition.

Also, you said that your system always corrupt. If it corrupts that often then you might have some problems with either your hardware or your habits of using Windows.