Database design

Hi all. I know this is not strictly a PHP question but the code will be written in PHP, and I figure the folks here will be well versed in the questions I raise. Please feel free to contact me off the list if appropriate.

I need some assistance with database design for a project I'm coding in PHP. I'm willing to pay for the advice, since I think it will be a bit complex. I plan to use MySQLi

If anybody feels they can assist, or can point elsewhere please feel free to contact me off list, or reply to the list if you think appropriate.

Thanks,
Angus