Yeah the script was made just for bitmap images.
You can get free FTP software here:
http://filezilla-project.org/download.php?type=client
Here is a screenshot of what it looks like. There is a bunch of crap that may over whelm you but really int he below screenshot you only put in the "Host", "Username" and "Password" and once you save it you would just click connect.
http://filezilla-project.org/images/...itemanager.png
Here is a link to some flash tutorials on how to use FileZilla:
http://www.demowolf.com/ftp-demos.php
If you want to give it a shot I'll send you some login information for an account and you can mess around with login in and uploading files. You can't hurt anything and once you get the hang of it I'll throw the script in your account and then you would just upload the images to a image folder.