OK, weird, but I finally got it working. StyleCatcher needs some fixing if you ask me -- I ended up having to upload the images myself.
Update: oh yeah, and do you think there is any simple explanation of how to use the styles available here? Oh no, you are supposed to somehow know. The so-called "tutorials" I found via Google were worse than useless, as was Sixapart's impossible-to-search "support" forum, and their huge (and now a .pdf file) user manual had no clue. But so what, I overcame the stupidity anyway, go me.