Need help on how to set up a server on my FTP so i can log o

Hello well my question is very simple.im so new at this, what i want to do is be able to set up my FTP like a server so from work me or my coworkers can log on and download the files needed from me,

i was wondering if someone can take the time to tell me what to do, now i know hot to log on to my ftp.wwww.com site and upload file to my host,

now how can i add that option on my FTP. liek where and what i have to do? do i have to type my IP somewhere? and how do i make it go to what folder o want to share, im running windows XP if you need any other imformation please let me know. thank you for your time.
Rico :?: