Graphical user interfaces using the Tcl/Tk Tool Command Language and graphical interface have been designed for both SPECTRUM and BLACKWEL. These GUIs are designed to make using SPECTRUM and BLACKWEL more easy and to integrate SPECTRUM with some of its auxiliary programs. The Tcl/Tk GUIs require that the Tcl/Tk toolkit be installed on your UNIX/Linux computer. To check to see if it is installed, type wish at the prompt. If a small, grey empty window appears on your screen, it is installed. If not, you should be able to install it via a package manager, or from the website http://www.tcl.tk/software/tcltk/. A Windows-based GUI has also been designed for SPECTRUM.