Thanks for the info, I'll get them fixed right away. I knew I would forget about adding the info on creating the graemlins directory when I added the code for it...
Adding complex regular expressions can be a bit tricky since you have to know how they work. But just adding new start and end tags are very easy and I'm thinking of making it even easier. But I would have to change the add form for that so I haven't really decided if I should do it yet.