Regular expressions and returns

[Keith Martin]

Sorry if this ends up appearing twice, but I posted it a few hours 
ago and it hasn't turned up yet. So...

I'm getting my head around regex (or so I like to pretend), but how 
would I use replaceText to find/replace a couple of items separated 
by one or more carraige returns? How do I specify: 'literal string', 
'one or more return characters', 'literal string' ..?

As in:
   <x> (return) <y>
or
   <x> (return, return) <y>
etc...

k, ready to say "Doh!"