Having problems with write permissions

A long time ago when I first set this up, someone helped me to allow read write permissions. It must have been an additinal cydia program I used to set it up but I forgot what I used now. I just put more roms for my SEGA CD but instead of having 2 files for each game all in the same folder I created game folders to clean it up a bit. But obviously some of those new game folders now need permission. Can someone refresh my memory to allow the permissions again? I have a program on the ipod itself named ifile but I don’t know how to use it.