is there any way to change file permissions on system files without rooting? i did an update on my a500 and it killed my wifi. wifi says error underneith it. I did find the reason for this and the files to update it. The original files are read only so i cant replace them or delete them and replace them with the new files because of their permission. Any help with this from anyone is greatly appreciated. I have tried root explorer and since the tablet isnt rooted, it doesnt work. Also ASTRO file manager and ex file manager and neither one has the ability to change permissions. If anyone has any suggestions please let me know.