Quick question

Hi there everyone, How do I set the following items with ini_set()? I looked at the manual but when I try nothing happens: * file_uploads * upload_max_filesize * max_input_time * memory_limit * max_execution_time * post_max_size Basically I need to be able to upload 1gig files via FTP which is based on PHP, when the file uploads successfully it then adds the info to a mysql database so that the administration program can control the programs uploaded, but I can't upload any large files only small ones. Any help would REALLY be appreciated as this is quite urgent and I've searched the net for examples but couldn't find what I needed. Help me o-b-1, you're my only hope :-) Thanks everyone. Chris