Help Help me fix my screen resolution!

[Pidluz]

I used a rooted app to experiment with the resolution on my mini, then tried hitting "restore factory resolution", and it thinks the factory res is 240, instead of 100.. I tried using a different such application, but my screen is to effed up, and i can't hit the button to grant the program root access. The developer told me to go into adb and enter the following.


>su
>busybox mount -o remount,rw /system
>busybox sed -i 's/ro.sf.lcd_density=.*/ro.sf.lcd_density=100/'
>/system/build.prop
>reboot

This is where i got


jeff-********-macbooklatform-tools *******$ ./adb devices
* daemon not running. starting it now on port 5037 *
* daemon started successfully *
List of devices attached
43423531314C47443739 device

jeff-*********-macbooklatform-tools ******$ ./su
-bash: ./su: No such file or directory
jeff-**********-macbooklatform-tools ******$ su
Password:
sh-3.2# busybox mount -o remount,rw /system
sh: busybox: command not found


Does this make sense to anyone? When it asked for password i entered the admin password for my macbook.. I obscured a few things with *'s, but you get the idea... Please help!