He is correct that you CANNOT use both the wireless LAN and bluetooth at the same time because the LAN Switching program he have is the older version which does not have the option to turn both the wireless LAN and bluetooth on at the same time. From looking at his screen, he have the option to turn only one of the following on: 802.11b, 802.11g, and bluetooth.
However, with the lastest version of the LAN Switching program, you CAN have both on. Which is what I am working with, a wireless LAN and a bluetooth mouse.