From that screen, you can run wad uninstaller:
http://gbatemp.net/index.php?download=2331
You need to have it burned to a DVD and be chipped (I think).
I don't know where to find an iso of wad uninstaller but I know there are copies floating around.
You burn the DVD (wad uninstaller) to auto boot, and place the bad wad on your sd card in a folder called wad. Put sd card in, put dvd in and power on, auto boot to uninstaller, re,move wad, reboot.
Note I *think this will work
*Edit read you don't have a mod chip, so try the tp way, that sounds good to me too
http://gbatemp.net/index.php?download=2331
You need to have it burned to a DVD and be chipped (I think).
I don't know where to find an iso of wad uninstaller but I know there are copies floating around.
You burn the DVD (wad uninstaller) to auto boot, and place the bad wad on your sd card in a folder called wad. Put sd card in, put dvd in and power on, auto boot to uninstaller, re,move wad, reboot.
Note I *think this will work
*Edit read you don't have a mod chip, so try the tp way, that sounds good to me too