When you need to transfer files between your computer and the web server you typically have three options.

Front Page extensions if you are using Front Page, or microsoft product.

The File Manager built into our web portal at http://portal.icomco.com/

FTP Software, which there are several developers that offer ftp software for free or at a low price.  To recommend a few you may want to look into:
FileZilla http://filezilla-project.org/download.php?type=client
LeapFTP http://www.leapware.com/download.html
WSFTP http://www.ipswitch.com/
CuteFTP http://www.cuteftp.com/
Free FireFox Plug In: http://fireftp.mozdev.org/