Default Download Client

I would like to have SmartFTP be the default download utility for both IE and Firefox so that any time a file is to be downloaded from a browser, SmartFTP is used to do the actual downloading.

Suggestions on how to do this or if it is even possible?

I don't think there is an option to register SmartFTP as Windows' default protocol handler for FTP yet, so you would have to edit the registry at HKEY_LOCAL_MACHINESoftwareClassesftp manually.

For Firefox, you additionally need to modify your prefs.js / user.js:
user_pref("network.protocol-handler.external.ftp", true);
Or use this extension: http://mozex.mozdev.org/