I would suggest:
1) Backup /etc/fstab (just in case):
2) edit fstab:
sudo cp /etc/fstab /etc/fstab_backup
and add the following two lines at the end:
gksu gedit /etc/fstab
/dev/sda5 /home/your_user_name/WindowsDisk1 ntfs rw,user,umask=007,uid=0,gid=46,nls=utf8 0 1
/dev/sda6 /home/your_user_name/WindowsDisk2 ntfs rw,user,umask=007,uid=0,gid=46,nls=utf8 0 1
* Replace "your_user_name" with your actual user name. Of course, you can change the directory names for the mount points to whatever you like.
* Backing up the data in the partitions before doing this is perhaps not strictly necessary, but it doesn't hurt either.
* EDIT: as oldfred said below, "uid=1000,gid=1000" will give your user ownership of all files in the mounted partition. With "uid=0, gid=46", the owner will be root. Choose what suits your needs best.
Hope this helps, good luck