Wireless setup for small conference room

Hi Experts,

I am trying to figure out the best way to add wireless to a small conference room.  I have only one network jack in the conference room.  I have another network jack in an adjacent room separated by a thin wooden door.  I have an all gigabit switch which can provide a VLAN to any number of ports.  We use an old laptop with 100 mb port hooked up to a projector in the room.  It connects to the onsite Terminal Server through the network.  I purchased a Netgear WDNR37000 wireless router hoping it would do the trick but the guest feature does not work.  If the guests can use the Internet they can also see computers on the network. I guess they would have to get the username and password to login but I don't think they should see anything.  I'm thinking I could get one less expensive wireless router for the conference room with a gigabit port that would connect to the network jack in the room.  And then maybe having a wireless n adapter for the laptop would give me greater than 100 mb speed for it.  And then everyone else that was with the company in the conference room would have access to the wireless with a network key.  And then I would buy another wireless router for the adjacent room, set up the VLAN for it to not enable it to browse the network, and the guests would use that.  Does anyone have any suggestions on what I should do?  I want to spend about $150.  Thank you very much.