yes - dreamweaver can be really helpful if you know what youre doing, but can be dangerous if you are just learning...
I remember a few times when I was inserting special tags for programs that did automatic replication and I thought I had it down, but dreamweaver doesnt always like foriegn tags and it fucked up the galleries - and woops, I forgot to check!
not good
I reccomend checking out some tutorial sites and maybe get a book - its always nice to have a reference at your side that isnt on the computer