FTP server on X.2 - How to set it up?????

Does anyone have any ideas on how to set up an FTP server?

I have used Transmit, but that app only lets you download/upload to a specific server. I want to set up my own FTP address so people can dowloand files from my computer. I want to be able to point out folders on my harddrive from where people can download files from. I've seen how easy it is on the PC, but i can't seem to get it to work on my Apple? Since i never want to buy a PC i need to know how to do it on the Mac.

Hopefully someone can help me out here. I know some of you have succesfull FTP servers running.

Thanks!