I finally got Bloggar to work with Radio. The hard part was figuring out the page to use since all my searches came up empty. So here is what I configured to make it work:

1. Host: 127.0.0.1
2. Page: /RPC2
3. Port: 5335
4. Posts: metaWeblog API
5. Categories: metaWeblog API – Multi

Earlier I had set up phpAdmin and WordPress on my local Fedora box and bloggar on my XP box. I then configured Bloggar to post to WordPress. Bloggar is now configured to post to two different weblogs. As you can probably surmise I plan on migrating away from Radio Userland to probably WordPress. I am now going to look into updating phpwebsite using bloggar.