Feko: Is there a way to merge results of two simulations with overlapping frequencies?

Hello,

my specific problem is that I have a fairly slow simulation for which I have computed results, and now I wish to combine additional results at different frequency samples with those. For example my original simulation had samples at 1-100MHz at 1MHz sample distance, and the second one had samples from 40-50MHz at 0.1 MHz sampling. I am primarily concerned with nearfield and farfield results.
Adding both to a graph individually does not work for surface graphs, and also more complex post processing is broken.