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Running XSPEC script do_mekalfit_simult_newcal_enmodcon.xcm performs the spectral fits and produces log files xismekalfit_simult_Y_3_6_am_circ_newcal_0520_nocontam_mekalfit_enmodcon_Y.log and XSPEC session files of the best fits xismekalfit_simult_Y_3_6_am_circ_newcal_0520_nocontam_mekalfit_enmodcon_Y.xcm, where Y is the cluster name.
The local model for the contaminant is included in the distribution and will be set up automatically, provided your XSPEC has been installed from the source.