Simulation-aided learning has capability in improving student's learning performance. However, the positive effect of simulation-aided learning still being discussed, which at times has not played the purported role expected. To address these problems, Multimedia Instructional Message (MIM) appeared to be an essential supporting tool in ensuring the success of simulation-aided learning. Hence, the focus of this study was mainly to develop and examine the usability and user satisfaction of MIM developed for Packet Tracer (PT) simulation. The MIM for PT simulation was developed based on graphic design theories, multimedia principles and literature review conducted. This paper discusses the development process and concluded with outcome of the usability and user satisfaction test carried out.