[2008] Listing files to downlaod in listbox

hi, i have a piece of software that lists the files in an ftp directory, and then when u click on that file, it is then downloaded by the webclient method, using the filename of the item selected.
e.g the ftp filelist for the file would be FTP://file.blalblabal.com/www/firmware/file.iso
the webclient would download http://file.blablabla/firmware/file.iso
This method takes a very long time to keep logging into the server everytime to list the files in the directory, is there a quicker way of doing this?
i thought about a text file to list the files, the program would then read the txt file and add them to the listbox, but this might take a while to update and add new files.
another method would be sql which i have no idea about, or it could read a html page of file names and the address aswell, but this would be more complex.
which method do you with would be best, or any other suggestions?

any ideas?