Another and easy way to mount your windows partition or local disk in BackTrack is by using ntfs-3g. That very easy way to deal with windows partition since it need to do manual and does not really work in each boot.
Note: This is alternative to edit the fstab file.
You can install ntfs-3g through terminal and if needed,also install ntfs-config.
apt-get install ntfs-config
After done install,go to "System" > "Administration" > "NTFS Configuration Tool"
You can proceed through that. Easy and work like a charm :D
NOTE: You may refer to this post about my specs i am running