Does anyone know how to modify the read-only values? If you try to modify most any sysctl value on the iPhone, you get an error saying something along the lines of oid 'value' is read-only. I know you can modify the read-only values on Linux by adding the OIDs to /boot/loader.conf or added the command to one of the scripts that are run at startup. None of these normal methods seem to apply to the iPhone.

And please no one respond with the stupid idea to added the commands to /etc/fstab. That file isn't a script and doesn't run any commands put in it. It is solely used to tell the device where the filesystems are located and which parameters to mount them with.