Why don't you just do the sniffing from your main computer? Ethereal can sniff a network with a hub. switched or routed networks will need something else.
Unfortunately for most windows users very few programs can be installed from the cml.
In fact winpcap can ONLY be installed from the GUI and all sniffers for windows are going to need it or windows won't know how to display the information of the raw packets or be able to set the device into permiscuous mode.