[Haskell-cafe] multi-line regex

I have some very simple regex-matching needs, and Text.Regex.Posix will work fine, EXCEPT I need to match multi-line patterns, and/or find all occurrences of text that may occur several times on different lines. So I need to turn on some kind of flag. Can someone show me how to do that? I have worked the examples in RWH so I basically know how to run the thing.