Sorry for the slow reply. We have been planning to do an FTPFolderBrowser for some time and will do it before too long. But I can't give you a date, so for now I can only suggest writing your own.
The FTPRemoteFileList is a UserControl with a ListView as well as the controls in the panel at the top. I don't think it would really help you much in creating a folder browser.
Depending on your requirements, creating a folder-browser control can either be fairly easy or quite difficult. A good programmer should be able to get a rudimentary folder-browser going in a few hours, but developing a really slick control could take several days.
To create a folder-browser you would (rather obviously) start with a TreeView control. You would use asynchronous methods to ensure that the GUI remains responsive while listings are being fetched from the server. It's important that you only fetch the directory listings as needed, i.e. when nodes are expanded. In other words, don't fetch the entire directory tree upon initialization since this will make it painfully slow.
Really I can't tell you much more than this since it's basically just a matter of building it bit by bit.
- Hans (EnterpriseDT)