SimSpect2D is the basic command, it takes as parameters : first a data-base of all the spins along with their chemical shift and linewidth; then a list of intensities in a simple free format, finally a set of controls, determining the 2D modulation and whether the data-set is symmetrical or not. This macro will generate a 2D FID, that can be then processed as a regular data-set. Be careful however, that the process can be quite lengthy, if you compute a large region, with a lot a peaks and a lot of points.
The chemical shift data-base is in dbm format, and can easily be built from an ascii file with the mkdbppm macro. The intensity file is in ascii, and can have been generated by any program. For instance, the CROWD program developped in our laboratory can create NOESY and ROESY simulation from 3D structures and dynamic information. However the SimSpect2D macro can be used to simulate any kind of 2D data-sets.
There is an additional macro available : SimSpect2D_form which creates a form permitting to very simply enter parameters for the SimSpect2D macro.