Slacko 7.0 savefile destination

I booted Slacko Puppy Linux 7.0 on a notebook. I mounted the single FAT32 partition /dev/sda1. At shutdown, it offers to make a savefile but the destination is the readonly DVD drive! I tried changing the destination folder to /mnt/sda1 but it still says that the filesystem is iso9660 and readonly. Any tips on getting puppy to save to /mnt/sda1?

Attached is a screenshot of the savefile dialog that i get at shutdown.
Attached Thumbnails