php.ini file question

Hi there,
I´m not sure if this is the correct place to post this but:

I have finally managed to locate my php.ini file using putty and the command locate php.ini and it tells me that i have two located at:
/etc/php.ini
/usr/local/psa/admin/conf/php.ini

my question is how do i copy these files to my computer, modify (i would image in notepad), and them reupload them to the server.

I need to make sure that my mail_sendto function is set properly as i´m having problems with a php script that i´m working on.

Any help much appreciated.
MsKazza