Mail 5 and GMail Aliases

[coastertux]

I have been using Sparrow for my GMail (I use GMail as a hub...all 4 of my accounts are through GMail and I use aliases to send mail through all my accounts SMTP servers). I really like Mail 5, and I like how it is all integrated with Leopard so I was wondering if it's possible to set up my GMail aliases in Mail 5 like I do in Sparrow so my outgoing mail is sent by the correct SMTP server, but shows up in my GMail sent mail folder. I have seen instructions for using other SMTP servers in Mail, but then the sent mail is not sent through Google and just stays in the local sent mail folder.