Exchange 2007: search multiple mailboxes

Hello all, I have been looking around the forums for this answer.

I have found out how to search multiple mailboxes in exchange 2007 powershell and assign the appropriate permissions.

Most of the fourms (so far) are not answering these few questions I have.

1) is there a way to search for an email (via keyword, or attachment, etc) and output the results of what mailbox it was found in

2) I think I know the answer to this already, but to search a mailbox you have to apparently export the message to another folder, now does this just copy the message from the source mailbox or move it out of the source mailbox. I do not want to move it. Thinking about it, it should just only copy it, is this correct?

3) is there a way to have it mail you what it found or just show you (in powershell) instead of dumping the contents to a folder?

Thanks for your help. If there is a forum that answers this already, can someone point it to me please?