Too late to redirect my RSS feed?

Well, I wandered back through a week of Scripting News and found the link Dave posted to how to redirect your RSS feed. The instructions are clear and easy to understand, but I realize now that it requires the ability to upload a file to replace the old rss.xml file at (and in the categories as well). But since I don’t have true FTP access to but just the ability to upstream, I think I’m probably shit-out-of-luck.