  Simulations of radio emission from extensive air showers we have published so
far were performed with a Monte Carlo code using analytical parametrisations to
describe the spatial, temporal, energy and angular particle distributions in
the air shower. A new version of our simulation code, which replaces these
parametrisations with precise, multi-dimensional histograms derived from
per-shower CORSIKA simulations, is now available. The new code allows an
independent selection between parametrisation and histogram for each of the
relevant distributions, enabling us to study the changes arising from using a
more realistic air shower model in detail. We describe the new simulation
strategy, present some initial results and discuss the new possibilities.
