Jix is a client for FotoBilder. You can use it to browse pictures on your computer an upload them to the LiveJournal ScrapBook.
Here's a screenshot of Jix on Windows XP:
Other SourceForge Jix info is at http://sourceforge.net/projects/fb-jix/ and there is a Jix community at LJ where you can post feedback, questions, suggestions, etc.: