^^

why dont u just use share folder?..
http://ubuntuguide.org/wiki/Ubuntu:Feisty#...rs_the_easy_way
samba to be specific..
after that in windows just open the xplorer and type "\\your_ubuntu_ip"..
depends on how you define the authentication an samba you should be able to get the same result as windows shared folder..

another alternative is use web server and point your download directory as web server root directory..

another one use winscp..
http://winscp.net/eng/index.php
but u need to install ssh server first..
http://ubuntuguide.org/wiki/Ubuntu:Feisty#...tration_service