routing in XP

Let say I have a laptop setup with a Verizon Aircard and it is also hard wired to a LAN. Is there a way to route internet traffic in and out of the aircard while having all intranet traffic go through the wired LAN. Our internet connection is going to be going down and I would like to set this laptop up with a LogMeIn account I can access through the aircard while accessing our network resources through the hard wire connection.