dedicated server optimization apache - PHP

<< adult content advisory>> I have a dedicated server which current running smoothly, but only support about 200 users online. I hope to find a server admin who can help me out to optimize the apache and php in my server so that It will provide the at 1000 concurrent connection for my video sharing page. Linux REDhat 5.0 DELL Dual xeon 2.8 GHz 533FSB 4G DDR2 RAM 2X 73GB:SCSI:Ultra320 RLX You will have the exceptional knowledge of server admin and knowledge of PHP/MYSQL Please feel free to ask any question before you place your bid. Thank you.