Question : need to restore an old exchange 2003 priv1.edb file into an exchange 2007

I have an exchange 2007 server, which we have migrated from a 2003 ages ago.. My boss wants to restore some old sent files. I've gone through my exchange 2007 backup files and can't find it.
I think i may have what im after in my old 2003 exchange backup, before i migrated.
Can i link an old priv1.edb into an exchange 2007 enviroment by making a new storage group ?

If i can, will this mess up the exsiting users ?

Answer : need to restore an old exchange 2003 priv1.edb file into an exchange 2007

Your best bet would be to create a virtual server with exchange 2003 on it and do a restore onto that. That way you are risking nothing.