The php.ini will usually be located within the /etc directory, but can then vary depending on the Linux distro running on it. Usually it's fairly easy, there will be a folder called php or php4 within /etc and then possibly another folder called apache within it. For example, on my Debian systems, I would:
and that's where php.ini is located. It may /etc/php/php.ini on your system, so have a look for a folder called php with /etc/ To change directory, you simply type
Once you've found the file, there are few different editors you could use, of which 'vi' is most likely to work on all systems, so again, as an example:
would let me edit the php.ini file on my system. There will be a line saying 'register_globals off' which you simply edit to say 'register_globals on'. It's usually disabled by default to prevent problems happening with your php code, and I'm surprised a pre-built solution needs it turning on.
Get back in touch if you'restill having problems.