Flash video / streaming video guru required

Hi We need some help and advice - I need to get flash video working at very high quality on a clients web site - maybe using h264 - or similar. If you are an expert this could be simple! Maybe even just recommending the best player and settings to encode at and helping us do this! Please give me links to work you have done - or describe what you can do to help me. Urgent job - all payment via GAF escrow. Good luck!