Search question (newbie)

Hi,

Can someone point me in the right direction please?
How can I trap this situation correctly? I receive user queries like
this (quotes included):

/from:"fred flintston*"/

Which produces a query string of

/+from:fred body:flintston/ (where /body/ is the default field)

What I want is:

/ +from:fred +from:flintston*/

In other words, I want quoted expressions to be treated as single units
Thanks for any pointers,

- Chris