There is a wealth of software and hardware available to do psychophysical experiments. The existence of various operating systems and various video display hardware makes re-using software component sometimes unrealistic. In this paper, I will discuss a library known as MAT2VSG that serves as the interface between MATLAB and Cambridge Research System's VSG2/3 running on a PC. MAT2VSG is aimed to help students and researchers perform some psychophysical testing from within the MATLAB environment. The framework of the MAT2VSG makes it flexible for future expansion. In addition, I will discuss the Crowded E (CRD) system for visualizing a special type of stimuli and collecting responses data. The goal of the experiment is to test the ability of the observer to discriminate orientation of a tumbling E stimulus. CRD provides the basic application framework for doing certain types of experiments. For experiments with slightly different goals but still utilizing the similar type of stimuli, CRD is a good starting system.