Depends on your needs. If you just have one or two sites to bookmark, then you may not need much more than what is included with the program. However, if you need to bookmarks a huge number of sites, then your best bet is to scrape your own list and add it to bmd. Its really not hard to do at all. The only real thing that will slow you down is the captcha costs and how slow BMD is.
If you do a quick search on the forum, there have been numerous lists shared for footprints to scrape for bookmarking sites.