Hello frndz.., yes v can coNtrol up to four networked PCs with single mouse and keyboard by using a SOFTWARE...! I have seen diz in a news paper[techNo column], followed the link.., found it useful nd am shariNg here., * software waz developed by MICROSOFT CORPORATION * This needz n0 additioNal hardware!! Website says- Simply install the program on each computer you want to control, follow the setup instructions and you will be sharing your mouse and keyboard in no time. Mouse Without Borders also lets you drag and drop files between machines (very cool), share the clipboard and retrieve screen captures from the other desktops. To move control from one computer to the next, simply move your mouse beyond the boundaries of the monitor and the program will automatically switch control to the other PC. You can configure up to 4 computer screens side-by-side or in two rows. Other features include support for hotkey switching, screensaver control and remote locking...