You can just get my dump script
http://spiffyhacks.com/thread-1.html called InnoTab_Backup.zip in the Other section. That should work fine. You can do anything you want on the device by just coding a bash script and running it the same way.
Edit: Nevermind, I see you wanted the system files and not the firmware dump. Open the _Run file in a text editor like pspad, NOT NOTEPAD! Find the Menu 2 part around line 300 and look for the part that checks what button was pressed
if [ "$button_pressed" == 'VDN' ]; then
doflashbackupinnotab
elif [ "$button_pressed" == 'VUP' ]; then
doflashinnotab
elif [ "$button_pressed" == 'HOM' ]; then
showmenu
elif [ "$button_pressed" == 'SHT' ]; then
dosystemdump
else
showmenutwo
fi
All you have to do is move the function to another button. If you want it to be the home button then do this
if [ "$button_pressed" == 'VDN' ]; then
doflashbackupinnotab
elif [ "$button_pressed" == 'VUP' ]; then
doflashinnotab
elif [ "$button_pressed" == 'HOM' ]; then
dosystemdump
elif [ "$button_pressed" == 'SHT' ]; then
dosystemdump
else
showmenutwo
fi
remplace showmenu with dosystemdump so it runs that function instead of showmenu when you press home. That is all there is to it.