Computer simulation of materials has been playing effective role nowadays in exploring many materials properties. Molecular dynamics simulation is a deterministic technique, which can provide information about the evolution of the system of particles as a function of time. This type of simulations is carried out using the forces defined by n-body potentials and by solving the equation of motion. Study of thin films and small particles is always of interest because of their technological applications. Technique of M.D. Simulation has been applied to understand the superheating of Pb thin films embedded in al matrix. Heating of Pb clusters has been examined to explore the surface effects. In this paper details of the technique of M.D simulation would be discussed. The simulated results of embedded thin films as well as clusters will be presented.