you can do it much easier by using mount --bind (then you won't need do go to rw-mode, save old files etc). Something like:
readabilitymod_install.sh
Code:
mount --bind /mnt/us/launchpad/readability_min_utf16.css /usr/share/browser/readability/readability_min_utf16.css
mount --bind /mnt/us/launchpad/readability_min_utf16.js /usr/share/browser/readability/readability_min_utf16.js
and
readabilitymod_uninstall.sh
Code:
umount /usr/share/browser/readability/readability_min_utf16.css
umount /usr/share/browser/readability/readability_min_utf16.js