Deleted /usr/lib by accident

view full story

http://www.linuxquestions.org – I accidentally deleted /usr/lib , by trying to delete a file from that directory, i didnt notice there was a blank space before the file i wanted to delete , so i had to reinstall fedora 14 again but it's ok because i just installed fedora yesterday. The question is if i can just make a backup of the whole directory /usr/lib , and other important directories and if something goes wrong , can i just copy and paste to their respective directories ? will that restore system stability or will it crash because of time stamps or anything like that. Attached Images L (HowTos)