Hi,
This is what, your fifth post about file manipulation? and so far all the responses have been pretty helpful, but its going to be a long slow process learning perl if you ask questions every for every single problem.

perlfaq5 contains some if not all of the answers and the ActiveState docs contain help for the CGI/server side issues you are coming across with permissions.
From the command line: perldoc perlfaq5
Perl . Com for more links.

We can and probably will help, but docs are your friend.