Working around the limit

1. Attach a small file of the same type (eg, zip or jpeg). That will create a record in the database with the correct filetype and will also create an entry in the files subdirectory.
2. Use FTP to replace the item in "files" with the real file. This mimics the usual action of the upload script except that it avoids the web server size limits.
3. If necessary, reopen the database record and change the title and URL filename.