Dreamhost is a Linux-centric host, they do not run any Windows servers, they don't like Windows servers, they don't even hardly pretend to support much the Front Pageserver extensions from what I've been hearing lately.
IF Front Page server extesnsions are a priority for you I think you'd do better to look elsewhere. If it's FTP you want and can do without Frontpage server extensions, that's no problem at all. Dreamhost is as solid as they come in the shared Linuz hosting world, ftp all day if you like
all that said, I didn't know that FP extensions and FTP were mutually exclusive, you might want to search Dreamhost's Knowledge Base for answers to Front Page (FrontPage) questions.