Writable Directory in the filesystem RR SDK

I've written an application and copied it into the filesystem but when I try to create or modify configuration files within my application directory I'm told :

mkdir: cannot create directory 'config': No space left on device

Can someone help me or point me to useful information for setting up a file or directory that is ReadWrite so that after I install my FS I can simply re-upload my file using scp modify configuration files and have them persist through a reboot.

As far as I can tell right now there are only a couple of rw areas but are all ram based:

/ # cat /proc/mounts
rootfs / rootfs rw 0 0
/dev/root / jffs2 rw 0 0
proc /proc proc rw 0 0
none /sys sysfs rw 0 0
none /tmp tmpfs rw 0 0
none /var tmpfs rw 0 0
none /dev tmpfs rw 0 0
devpts /dev/pts devpts rw,gid=5,mode=620 0 0
/ # df
Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/root                22016     22016         0 100% /
none                     57176         0     57176   0% /tmp
none                     57176        16     57160   0% /var
none                     57176         0     57176   0% /dev

I'm using RR SDK