Actually you can't. The only way of accesing resources on the network is by using a DOMAIN USER as your service account.

Depending on the size of the database and if it's possible to take the DB offline I often use sp_detach_DB, then copy the files and sp_attach_db to connect the Db...

You can change the exchange type by editing the job properties. Open the step "run agent" and add -Exchangetype 1. Anyway I've never used this setting, so I would advice...

Good and very useful article. But I just want to add a link to another article in case something goes wrong with sp_attach.

http://www.sqlteam.com/item.asp?ItemID=10060

Everybody should read this one before...