The easiest way to do this is to use a splitter, such as the Y- Mouse made by P.I. Engineering. If you want to go this route, make sure that the other mouse can use the same mouse driver as the RemotePoint. Menus open up when I move the cursor. The behavior of the cursor that you're seeing is due to fluorescent interference. The RemotePoint transmitter uses Infrared light to send data to the receiver.
Some fluorescent lights generate Infrared light in addition to visible light.
This can interfere with the transmitter signal and sometimes causes the erratic cursor behavior you see. If the receiver is directly underneath or is in very close proximity of a fluorescent fixture, it needs to be re-positioned. Also remember to maintain a minimum distance of two feet between the receiver and the transmitter. All rights reserved.