Using Windows Mail from 2 accounts on same laptop

Hi folks. I have just started a new job and am using my laptop from home, which has Vista Home. I use Windows Mail. (ok, you guessed there's a budget problem in here). Anyway, I needed to set up a new User to do certain things related only to work. I now want to run Windows Mail from both user accounts on the same computer. Is there anyway I can access the same folders/inbox etc? Obviously the smtp and pop3 details are the same. Just need to work out how to tell Vista its okay to use the same folders.