well, first you would want to make a phpinfo file and then view it in your browser so that you can see what directives, if any need to be changed from the default php configuration.
Once you know if you need to set anything on or off, then the syntax for your php.ini would be like so:
Code:
safe_mode = Off
register_globals = Off
upload_max_filesize = 200M
post_max_size = 200M
max_execution_time = 900
Safe Mode and Register Globals are already off. The 2 below that are for your 200Meg uploads. And the last one is set to 900 which is 15 minutes. (60 seconds * 15)